proxmox ext4 vs xfs. LVM is one of Linux’s leading volume managers and is alongside a filesystem for dynamic resizing of the system disk space. proxmox ext4 vs xfs

 
 LVM is one of Linux’s leading volume managers and is alongside a filesystem for dynamic resizing of the system disk spaceproxmox ext4 vs xfs  There are two more empty drive bays in the

2 Use it in Proxmox. g. If it’s speed you’re after then regular Ext4 or XFS performs way better, but you lose the features of Btrfs/ZFS along the way. For ext4 file system, use resize2fs. e. 7T 0 part ext4 d8871cd7-11b1-4f75-8cb6-254a6120 72f6 sdd1 8:49 0 3. Ext4文件系统是Ext3的继承者,是Linux下的主流文件系统。经过多年的发展,它是目前最稳定的文件系统之一。但是,老实说,与其他Linux文件系统相比,它并不是最好的Linux文件系统。 在XFS vs Ext4方面,XFS在以下几个方面优. remount zvol to /var/lib/vz. then run: Code: ps ax | grep file-restore. Snapshot and checksum capability are useful to me. I have not tried vmware, they don’t support software raid and I’m not sure there’s a RAID card for the u. 3-based kernel. Maybe a further logical volume dedicated to ISO storage or guest backups?ZFS doesn't really need a whole lot of RAM, it just wants it for caching. It was basically developed to allow one to combine many inexpensive and small disks into an array in order to realize redundancy goals. g. Even if you don’t get the advantages that come from multi-disk systems, you do get the luxury of ZFS snapshots and replication. The Proxmox VE installer, which partitions the local disk(s) with ext4, XFS, BTRFS (technology preview), or ZFS and installs the operating system. As cotas XFS não são uma opção remountable. Complete tool-set to administer backups and all necessary resources. Some features do use a fair bit of RAM (like automatic deduplication), but those are features that most other filesystems lack entirely. Share. For a while, MySQL (not Maria DB) had performance issues on XFS with default settings, but even that is a thing of the past. You can check in Proxmox/Your node/Disks. On my old installation (Upgrade machine from pve3 to pve4) there is the defaultcompression to "on". Btrfs is still developmental and has some deficiencies that need to be worked out - but have made a fair amount of progress. replicate your /var/lib/vz into zfs zvol. On the Datacenter tab select Storage and hit Add. Dom0 mostly on f2fs on NVME, default pool root of about half the qubes on XFS on ssd (didn’t want to mess with LVM so need fs supports reflinks and write amplification much less than BTRFS) and everything. For a single disk, both are good options. Funny you mention the lack of planning. ext4 can claim historical stability, while the consumer advantage of btrfs is snapshots (the ease of subvolumes is nice too, rather than having to partition). fiveangle. Directory is the mount point, in our case it's /mnt/Store1 for. This is addressed in this knowledge base article; the main consideration for you will be the support levels available: Ext4 is supported up to 50TB, XFS up to 500TB. We think our community is one of the best thanks to people like you! Quick Navigation. Yes, both BTRFS and ZFS have advanced features that are missing in EXT4. LosPollosHermanos said: Apparently you cannot do QCOW2 on LVM with Virtualizor, only file storage. Tens of thousands of happy customers have a Proxmox subscription. Install Debian: 32GB root (ext4), 16GB swap, and 512MB boot in NVMe. ZFS dedup needs a lot of memory. Proxmox actually creates the « datastore » in an LVM so you’re good there. Both ext4 and XFS should be able to handle it. Subscription Agreements. As well as ext4. I. If you're planning to use hardware RAID, then don't use ZFS. Curl-bash scripts are a potential security risk. For really big data, you’d probably end up looking at shared storage, which by default means GFS2 on RHEL 7, except that for Hadoop you’d use HDFS or GlusterFS. 2. 9 /sec. It replicates guest volumes to another node so that all data is available without using shared storage. Starting with Proxmox VE 7. ZFS expects to be in total control, and will behave weird or kicks out disks if you're putting a "smart" HBA between ZFS and the disks. LVM vs. Navigate to the official Proxmox Downloads page and select Proxmox Virtual Environment. What's the right way to do this in Proxmox (maybe zfs subvolumes)? 8. Proxmox running ZFS. Follow for more stories like this 😊And thus requires more handling (processing) of all the traffic in and out of the container vs bare metal. Complete toolset. 3 XFS. For Proxmox, EXT4 on top of LVM. I've used BTRFS successfully on a single drive proxmox host + VM. Click remove and confirm. I have a RHEL7 box at work with a completely misconfigured partition scheme with XFS. Compressing the data is definitely worth it since there is no speed penalty. brown2green. NEW: Version 8. Utilice. Choose the unused disk (e. It was mature and robust. Post by Sabuj Pattanayek Hi, I've seen that EXT4 has better random I/O performance than XFS, especially on small reads and writes. I chose to use Proxmox as the OS for the NAS for ease of management, and also installed Proxmox Backup Server on the same system. It supports large file systems and provides excellent scalability and reliability. ZFS storage uses ZFS volumes which can be thin provisioned. Zfs is terrific filesystem. They perform differently for some specific workloads like creating or deleting tenthousands of files / folders. Remember, ZFS dates back to 2005, and it tends to get leaner as time moves on. . Select your Country, Time zone and Keyboard LayoutHi, on a fresh install of Proxmox with BTRFS, I noticed that the containers install by default with a loop device formatted as ext4, instead of using a BTRFS subvolume, even when the disk is configured using the BTRFS storage backend. The chart below displays the difference in terms of hard drive space reserved for redundancy. You either copy everything twice or not. 1. Snapshots are free. Sistemas de archivos en red 1. (Equivalent to running update-grub on systems with ext4 or xfs on root). This allows the system administrator to fine tune via the mode option between consistency of the backups and downtime of the guest system. Get your own in 60 seconds. Starting from version 4. . Remove the local-lvm from storage in the GUI. It may consume a lot of RAM if you'll enable deduplication feature, but I think it makes sense only for backup servers and similar storage scenarios, not for casual users/gamers. start a file-restore, try to open a disk. . Yeah those are all fine, but for a single disk i would rather suggest BTRFS because it's one of the only FS that you can extend to other drives later without having to move all the data away and reformat. File Systems: OpenMediaVault vs. Ext4 and XFS are the fastest, as expected. After having typed zfs_unlock and waited the system to boot fully, the login takes +25 seconds to complete due to systemd-logind service fails to start. Supported LBA Sizes (NSID 0x1) Id Fmt Data Metadt Rel_Perf 0 - 512 0 2 1. Then i manually setup proxmox and after that, i create a lv as a lvm-thin with the unused storage of the volume group. The hardware raid controller will and does function the same regardless if the file system is NTFS, ext(x), xfs, etc etc. Code: mount /media/data. The host is proxmox 7. The ext4 file system is still fully supported in Red Hat Enterprise Linux 7 and can be selected at installation. 1. ) Inside your VM, use a standard filesystem like EXT4 or XFS or NTFS. The default value for username is root@pam. 1 Proxmox Virtual Environment. EDIT 1: Added that BTRFS is the default filesystem for Red Hat but only on Fedora. Offizieller Beitrag. As you can see all the disks Proxmox detects are now shown and we want to select the SSDs of which we want to create a mirror and install Proxmox onto. TrueNAS. EXT4 is the successor of EXT3, the most used Linux file system. Results were the same, +/- 10% Yes you can snapshot a zvol like anything else in ZFS. Unraid runs storage and a few media/download-related containers. So yes you can do it but it's not recommended and could potentially cause data loss. Add the storage space to Proxmox. This article here has a nice summary of ZFS's features: acohdehydrogenase • 4 yr. brown2green. Adding --add-datastore parameter means a datastore is created automatically on the. 6-pve1. 3. You can specify a port if your backup. #6. Let’s go through the different features of the two filesystems. Wanted to run a few test VMs at home on it, nothing. LVM is a separate volume manager, providing flexibility in storage allocation without ZFS’s advanced features. Get your own in 60 seconds. Você pode então configurar a aplicação de cotas usando uma opção de montagem. Installed Proxmox PVE on the SSD, and want to use the 3x3TB disks for VM's and file storage. docker successfully installed and running but that warning message appears in the proxmox host and I don't understand, why?! In the docker lxc, docker info shows that overlay2 is used. Unless you're doing something crazy, ext4 or btrfs would both be fine. But beneath its user-friendly interface lies every Proxmox user’s crucial decision: choosing the right filesystem. And this lvm-thin i register in proxmox and use it for my lxc containers. As modern computing gets more and more advanced, data files get larger and more. What should I pay attention regarding filesystems inside my VMs ?. Hinsichtlich des SpeicherSetting habe ich mich ein wenig mit den folgenden Optionen befasst: Hardware-RAID mit batteriegepuffertem Schreibcache (BBU) Nicht-RAID für ZFS Grundsätzlich ist die zweite Option. by carum carvi » Sat Apr 25, 2020 1:14 am. ISO's could probably be stored on SSD as they are relatively small. Move/Migrate from 1 to 3. sdb is Proxmox and the rest are in a raidz zpool named Asgard. 1. However, it has a maximum of 4KB. Note that ESXi does not support software RAID implementations. Defaults: ext4 and XFS. Create a VM inside proxmox, use Qcow2 as the VM HDD. Ich selbst nehme da der Einfachheit und. So the rootfs lv, as well as the log lv, is in each situation a normal. 0 is in the pre-release stage now and includes TRIM,) and I don't see you writing enough data to it in that time to trash the drive. ago. Regardless of your choice of volume manager, you can always use both LVM and ZFS to manage your data across disks and servers when you move onto a VPS platform as well. Also, for the Proxmox Host - should it be EXT4 or ZFS? Additionally, should I use the Proxmox host drive as SSD Cache as well? ext4 is slow. Distribution of one file system to several devices. Shrink / Reduce a volume with an LVM-XFS partition. #1 Just picked up an Intel Coffee Lake NUC. Si su aplicación falla con números de inodo grandes, monte el sistema de archivos XFS con la opción -o inode32 para imponer números de inodo inferiores a 232. The device to convert must be unmountable so you have to boot ie from a live iso to convert your NethServer root filesystem. We are looking for the best filesystem for the purpose of RAID1 host partitions. proxmox-boot-tool format /dev/sdb2 --force - change mine /dev/sdb2 to your new EFI drive's partition. XFS has a few features that ext4 has not like CoW but it can't be shrinked while ext4 can. For a server you would typically boot from an internal SD card (or hw. . Various internet sources suggest that XFS is faster and better, but taking into account that they also suggest that EXT4 is. Proxmox VE currently uses one of two bootloaders depending on the disk setup selected in the installer. Step 4: Resize / partition to fill all space. Even if I'm not running Proxmox it's my preferred storage setup. This section highlights the differences when using or administering an XFS file system. ZFS is an advanced filesystem and many of its features focus mainly on reliability. XFS mount parameters - it depends on the underlying HW. However the default filesystem suggested by the Centos7 installer is XFS. 2 drive, 1 Gold for Movies, and 3 reds with the TV Shows balanced appropriately, figuring less usage on them individually) --or-- throwing 1x Gold in and. "EXT4 does not support concurrent writes, XFS does" (But) EXT4 is more "mainline"The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. I've tweaked the answer slightly. Because of this, and because EXT4 seems to have better TRIM support, my habit is to make SSD boot/root drives EXT4, and non-root bulk data spinning-rust drives/arrays XFS. I want to use 1TB of this zpool as storage for 2 VMs. Now click the Take Screenshot button, as shown in the following screenshot: Creating a snapshot in Proxmox using the web based GUI. Get your own in 60 seconds. Ext4 has a more robust fsck and runs faster on low-powered systems. d/rc. Key Points: ZFS stands for Zettabyte filesystem. Also, the disk we are testing has contained one of the three FSs: ext4, xfs or btrfs. Tens of thousands of happy customers have a Proxmox subscription. With iostat XFS zd0 gave 2. No LVM for simplicity of RAID recovery. The installer will auto-select the installed disk drive, as shown in the following screenshot: The Advanced Options include some ZFS performance-related configurations such as compress, checksum, and ashift or. Snapraid says if the disk size is below 16TB there are no limitations, if above 16TB the parity drive has to be XFS because the parity is a single file and EXT4 has a file size limit of 16TB. Here is the basic command for ext4: # resize2fs /dev/vg00/sales-lv 3T Reduce capacity. Januar 2020. With Proxmox you need a reliable OS/boot drive more than a fast one. However Proxmox is a Debian derivative so installing properly is a gigantic PITA. I haven't tried to explain the fsync thing any better. Linux filesystems EXT4 vs XFS, what to choose, what is better. snapshots are also missing. Create a zvol, use it as your VM disk. The problem (which i understand is fairly common) is that performance of a single NVMe drive on zfs vs ext4 is atrocious. Extents File System, or XFS, is a 64-bit, high-performance journaling file system that comes as default for the RHEL family. This. I have sufficient disks to create an HDD ZFS pool and a SSD ZFS pool, as well as a SSD/NVMe for boot drive. The terminology is really there for mdraid, not ZFS. If you use Debian, Ubuntu, or Fedora Workstation, the installer defaults to ext4. ago. Good day all. Dude, you are a loooong way from understanding what it takes to build a stable file server. This can be an advantage if you know and want to build everything from scratch, or not. zfs is not for serious use (or is it in the kernel yet?). As in general practice xfs is being used for large file systems not likely for / and /boot and /var. Additionally, ZFS works really well with different sized disks and pool expansion from what I've read. The ZFS file system combines a volume manager and file. NVMe drives formatted to 4096k. Once you have selected Directory it is time to fill out some info. If you have SMR drives, don't use ZFS! And perhaps also not BTRFS, I had a small server which unknown to me had an SMR disk with ZFS proxmox server to experiment with. Subscription period is one year from purchase date. xfs but I don't know where the linux block device is stored, It isn't in /dev directory. I get many times a month: [11127866. The kvm guest may even freeze when high IO traffic is done on the guest. Hit Options and change EXT4 to ZFS (Raid 1). Centos7 on host. 14 Git and tested in their default/out-of-the-box. raid-10 mit 6 Platten; oder SSDs, oder Cache). g. BTRFS and ZFS are metadata vs. One caveat I can think of is /etc/fstab and some other things may be somewhat different for ZFS root and so should probably not be transferred over. Note: If you have used xfs, replace ext4 with xfs. My goal is not to over-optimise in an early stage, but I want to make an informed file system decision and stick with that. Btrfs El sistema de archivos Btrfs nació como sucesor natural de EXT4, su objetivo es sustituirlo eliminando el mayor número de sus limitaciones, sobre todo lo referido al tamaño. 高并发压力下 xfs 的性能比 ext4 高 5-10% 左右。. Create a directory to store the backups: mkdir -p /mnt/data/backup/. Also, the disk we are testing has contained one of the three FSs: ext4, xfs or btrfs. Ext4 is the default file system on most Linux distributions for a reason. That's right, XFS "repairs" errors on the fly, whereas ext4 requires you to remount read-only and fsck. I recently rebuilt my NAS and took the opportunity to redesign based on some of the ideas from PMS. Btrfs supports RAID 0, 1, 10, 5, and 6, while ZFS supports various RAID-Z levels (RAID-Z, RAID-Z2, and RAID-Z3). storage pool type: lvmthin LVM normally allocates blocks when you create a volume. Btrfs trails the other options for a database in terms of latency and throughput. Unfortunately you will probably lose a few files in both cases. Background. Clean installs of Ubuntu 19. Oct. can someone point me to a howto that will show me how to use a single disk with proxmox and ZFS so I can migrate my esxi vms. Note that when adding a directory as a BTRFS storage, which is not itself also the mount point, it is highly recommended to specify the actual mount point via the is_mountpoint option. In the table you will see "EFI" on your new drive under Usage column. For Proxmox VE versions up to 4. There's nothing wrong with ext4 on a qcow2 image - you get practically the same performance as traditional ZFS, with the added bonus of being able to make snapshots. What you get in return is a very high level of data consistency and advanced features. drauf liegen würden, die auch über das BS cachen tuen. . El sistema de archivos es mayor de 2 TiB con inodos de 512 bytes. 703K subscribers in the DataHoarder community. Hello, this day have seen that compression is default on (rpool) lz4 by new installations. 15 comments. Ability to shrink filesystem. Compared to Ext4, XFS has a relatively poor performance for single threaded, metadata-intensive workloads. EarthyFeet. Click to expand. ext4 is slow. Như vậy, chúng ta có thể dễ dàng kết hợp các phân vùng định dạng Ext2, Ext3 và Ext4 trong cùng 1 ổ đĩa trong Ubuntu để. backups ). Features of the XFS and ZFS. ext4 vs xfs vs. It's not the fastest but not exactly a slouch. Tenga en cuenta que el uso de inode32 no afecta a los inodos que ya están asignados con números de 64 bits. ZFS can complete volume-related tasks like managing tiered storage and. Home Get Subscription Wiki Downloads Proxmox Customer Portal About. Jan 5, 2016. RAID. Select the Target Harddisk Note: Don’t change the filesystem unless you know what you are doing and want to use ZFS, Btrfs or xfs. “/data”) mkdir /data. xfs /dev/zvol/zdata/myvol, mounted it and sent in a 2 MB/s stream via pv again. 4. Users should contemplate their. I hope that's a typo, because XFS offers zero data integrity protection. all kinds for nice features (like extents, subsecond timestamps) which ext3 does not have. ext4 4 threads: 74 MiB/sec. ago. If you use Debian, Ubuntu, or Fedora Workstation, the installer defaults to ext4. A directory is a file level storage, so you can store any content type like virtual disk images, containers, templates, ISO images or backup files. for that you would need a mirror). The ability to "zfs send" your entire disk to another machine or storage while the system is still running is great for backups. There are a lot of post and blogs warning about extreme wear on SSD on Proxmox when using ZFS. Running on an x570 server board with Ryzen 5900X + 128GB of ECC RAM. 10 with ext4 as main file system (FS). Tried all three, following is the stats - XFS #pveperf /vmdiskProxmox VE Community Subscription 4 CPUs/year. If anything goes wrong you can. In Summary, ZFS, by contrast with EXT4, offers nearly unlimited capacity for data and metadata storage. Resize the filesystem on the Logical Volume. xfs is really nice and reliable. 2. ago. If this were ext4, resizing the volumes would have solved the problem. If I were doing that today, I would do a bake-off of OverlayFS vs. When you do so Proxmox will remove all separately stored data and puts your VM's disk back. Hope that answers your question. During installation, you can format the spinny boy with xfs (or ext4… haven’t seen a strong argument for one being way better than the other. BTRFS integration is currently a technology preview in Proxmox VE. Crucial P3 2TB PCIe Gen3 3D NAND NVMe M. (You can also use RAW or something else, but this removes a lot of the benefits of things like Thin Provisioning. As putting zfs inside zfs is not correct. This will create a. ZFS combines a file system and volume manager, offering advanced features like data integrity checks, snapshots, and built-in RAID support. The maximum total size of a ZFS file system is exbibytes minus one byte. Also consider XFS, though. 8. proxmox-boot-tool format /dev/sdb2 --force - change mine /dev/sdb2 to your new EFI drive's partition. 1. jinjer Active Member. ". Complete operating system (Debian Linux, 64-bit) Proxmox Linux kernel with ZFS support. If you think that you need the advanced features. When dealing with multi-disk configurations and RAID, the ZFS file-system on Linux can begin to outperform EXT4 at least in some configurations. So that's what most Linux users would be familiar with. service. Cheaper SSD/USB/SD cards tend to get eaten up by Proxmox, hence the High Endurance. Be sure to have a working backup before trying filesystem conversion. B. Newbie alert! I have a 3 node Ubuntu 22. 52TB I want to dedicate to GlusterFS (which will then be linked to k8s nodes running on the VMs through a storage class). /dev/sdb ) from the Disk drop-down box, and then select the filesystem (e. you're all. On one hand I like the fact that raid is expandable with a single disk at a time instead of a whole vdev in zfs which also comes at the cost of another disk lost to parity. Basically, LVM with XFS and swap. Hi, xfs und ext4 sind beides gute Datei-Systeme! Aber beide machen aus einem raid1 mit 4TB-Sata-Platten kein Turbo. This includes workload that creates or deletes. Load averages on systems where load average with. Latency for both XFS and EXT4 were comparable in. Elegir un sistema de archivos local 1. Ext4 has a more robust fsck and runs faster on low-powered systems. Defragmentieren ist in der Tat überflüssig bei SSDs oder HDDS auf CoW FS. As I understand it it's about exact timing, where XFS ends up with a 30-second window for. Then I selected the "Hardware" tab and selected "Hard Disk" and then clicked the resize. Comparing direct XFS/ext4 vs Longhorn which has distributed built-in its design, may provide the incorrect expectation. kwinz. Meaning you can get high availability VMs without ceph or any other cluster storage system. org's git. Here are some key differences between them: XFS is a high-performance file system that Silicon Graphics originally developed. Everything on the ZFS volume freely shares space, so for example you don't need to statically decide how much space Proxmox's root FS requires, it can grow or shrink as needed. 0 einzurichten. ext4. Khá tương đồng với Ext4 về một số mặt nào đó. I usually use ext4 on the root (OS) volume along with some space for VMs (that can be run on lvm/ext4). We can also set the custom disk or partition sizes through the advanced. It's got oodles of RAM and more than enough CPU horsepower to chew through these storage tests without breaking a sweat. A mininal WSL distribution that would chroot to the XFS root that then runs a script to mount the ZFS dataset and then start postgres would be my preferred solution, if it's not possible to do that from CBL-Mariner (to reduce the number of things used, as simplicity often brings more performance). (Install proxmox on the NVME, or on another SATA SSD). The container has 2 disk (raw format), the rootfs and an additional mount point, both of them are in ext4, I want to format to xfs the second mount point. Key Takeaway: ZFS and BTRFS are two popular file systems used for storing data, both of which offer advanced features such as copy-on-write technology, snapshots, RAID configurations and built in compression algorithms. Run through the steps on their official instructions for making a USB installer. OS. . 7. You can create an ext4 or xfs filesystem on a disk using fs create, or by navigating to Administration -> Storage/Disks -> Directory in the web interface and creating one from there. EvertM. or really quite arbitrary data. The XFS one on the other hand take around 11-13 hours!But Proxmox won't anyway. I don't want people just talking about their theory and different opinions without real measurements in real world. For LXC, Proxmox uses ZFS subvols, but ZFS subvols cannot be formatted with a different filesystem. The Proxmox Backup Server installer, which partitions the local disk(s) with ext4, xfs or ZFS, and installs the operating system. But there are allocation group differences: Ext4 has user-configurable group size from 1K to 64K blocks. While RAID 5 and 6 can be compared to RAID Z. You could later add another disk and turn that into the equivalent of raid 1 by adding it to the existing vdev, or raid 0 by adding it as another single disk vdev. Create snapshot options in Proxmox. 3 and following this guide to install it on a Hetzner server with ZFS Encryption enabled. And this lvm-thin i register in proxmox and use it for my lxc containers. Red Hat Training. /dev/sdb ) from the Disk drop-down box, and then select the filesystem (e. Btrfs uses Copy-on-Write (COW), a resource management technique where a. 2) Proxmox 2. Con: rumor has it that it is slower than ext3, the fsync dataloss soap. With the integrated web-based user interface you can manage VMs and containers, high availability for. We tried, in proxmox, EXT4, ZFS, XFS, RAW & QCOW2 combinations. 6. Create zfs zvol. LVM thin pools instead allocates blocks when they are written. EXT4 is very low-hassle, normal journaled filesystem. Starting with Red Hat Enterprise Linux 7. LVM is one of Linux’s leading volume managers and is alongside a filesystem for dynamic resizing of the system disk space. When you create a snapshot Proxmox basically freezes the data of your VM's disk at that point in time. I personally haven't noticed any difference in RAM consumption when switched from ext4 about a year ago. Looking for advise on how that should be setup, from a storage perspective and VM/Container. Procedure. By far, XFS can handle large data better than any other filesystem on this list and do it reliably too. ZFS und auch ext4, xfs, etc. I want to use 1TB of this zpool as storage for 2 VMs. growpart is used to expand the sda1 partition to the whole sda disk. Select the local-lvm, Click on “Remove” button. This is addressed in this knowledge base article; the main consideration for you will be the support levels available: Ext4 is supported up to 50TB, XFS up to 500TB. Three identical nodes, each with 256 GB nvme + 256 GB sata. Which file system is better XFS or Ext4? › In terms of XFS vs Ext4, XFS is superior to Ext4 in the following aspects: Larger Partition Size and File Size: Ext4 supports partition size up to 1 EiB and file size up to 16 TiB, while XFS supports partition size and file size up to 8 EiB. Select local-lvm. A 3TB / volume and the software in /opt routinely chews up disk space. davon aus das erfolgreich geschrieben ist, der Raidcontroller erledigt dies, wenn auch später.