By attaching a disk to an existing disk, we mean attaching it to its mirror you can attach more than one disk to a mirror. Installing a zfs root file system initial installation. How to create a mirrored root pool post installation. Zfs is a combined file system and logical volume manager designed by sun microsystems. Im trying to write some software that will work generically across different oss and systems running zfs, and using the wwn id to specify the drives is the best way to accomplish that. Then the other disk s0 after rebuildresilver is complete be sure to check eeprom and primary domain for boot device specification. Zil zfs intent log drives can be added to a zfs pool to speed up the write capabilities of any level of zfs raid. You can use the zpool split command to detach disks from a mirrored zfs storage pool to create a new pool with one of the detached disks.
As shown in the output below, c0t1d0 need to be replaced as it is having a lot of errors. Once the pool is created, check zpool status just to make sure you dont see the same warning. Click yes to convert the basic disks to dynamic disks, which. This is a handy command if you want a threeway mirror but dont have all three drives to start with you can get the ball rolling with a 2way mirror and add the third drive down the track. Breaking a zfs mirror solaris 11 notes of a systems. The failed disks is automatically replaced by the spare device and administrator can replace the failed disks at later time. The pool is formatted using an older on disk format. How to setup zfs filesystem on linux with zpool command. You have to specify also zpool to which you want to add disk. Attach the second disk as a mirror of the first, wait for resilver, remove the first disk, set the properties to autoexpand. The zpool utility controls the operation of the pool and deals with adding, removing. Iirc for a single disk pool to be converted into a mirror you only specify zpool attach.
I want to add a disk to create a mirror, but it fails. Can i create virtual disk from zpool on solaris 11. I too had this problem and created a new lun and added to the zpool safe way and it works. When i tried to attach it back, the resilvering is done with the below output.
Hi i had detached the mirror c1t1d0s6 from the zpool zones. Attaching a disk as a mirror is normally pretty easy, but this disk did not have any slices on it. The virtual device that you add should have the same level of redundancy as the existing virtual device. By adding a disk to a pool, we mean expanding the pool size in the sense of striping in another disk or sets of mirroredraidz disks. Adding devices to a storage pool oracle help center.
The new pool will have identical contents to the original mirrored zfs storage pool. However, you can change the level of redundancy by using the f option. Zfs zpool attach no such pool or dataset the freebsd. The correct disk labeling and the boot blocks are applied. How to set up a zfs root pool mirror in oracle solaris 11 express. By default, a zpool split operation on a mirrored pool detaches the last disk for the newly created pool.
Adding a physical disk as a mirror to an existing zpool. Upgrade the single disk stripe vdev ada0p3 to a mirror by attaching ada1p3. This will require that you have free space in rpool for such actions. The pool will continue to function, possibly in a degraded state. Attach 10tb drive as a mirror to the 6tb disk, like so. Jun 06, 2006 sufficient replicas exist for the pool to continue functioning in a degraded state.
To add the two new disks to the pool, you can use zpool add tank mirror sdb sdc but this will add the new pair as a mirror, and stripe it with the existing disk. The following command upgrades all zfs storage pools to the current version of the software. Attaching and detaching devices in a storage pool in addition to the zpool add command, you can use the zpool attach command to add a new device to an existing mirrored or nonmirrored device. Example 11 managing hot spares the following command creates a new pool with an available hot spare. Solaris 11 creating and maintaining zfs pools the urban penguin. Jun 10, 20 attach replacement to the degraded vdev. Short term, you could mirror that last disk to remove it as a spof. In addition to the zpool add command, you can use the zpool attach command to add a new device to an existing mirrored or nonmirrored device. This operation is identical to attaching a device in a unmirrored storage pool. Check, that everything went well and wait until the resilvering is finished. A zfs pool can be expanded at any time by adding new vdevs, including. When the disk fails, freebsd fails and your system will go down. I have two hard disks in ma server, but after installation i have only one. Assuming c0t0d0 and c0t1d0 are mirrored in the zfs rpool, and c0t1d0 need to be replaced.
I have a zpool consisting of 4 hard drives of which one died yesterday and now is not being recognized by the os or the bios anymore. Zfs zpool attach no such pool or dataset the freebsd forums. The different was that add created a striped zpool raid0 across all vdevs and attach created a mirrored pool raid1 across all vdevs. It comes in two types and can ensure that all your data remains safe even if the hard disk fails to boot. Ive got some old disks id like to create a storage pool with just so i.
A raid array of 2 hard drives and an ssd caching disk is. How to remove a device from a zpool oracle community. The zfs hot spares feature enables you to identify disks that can be used to replace a failed or faulted device in one or more storage pools. To summarize, if you need to remove a disk from a pool and later add it back without requiring a full resilvering then the approach id recommend is. A striped mirrored vdev zpool is very similar to raid10. Mar 29, 2016 similarly, we can use attach command to attach disks to a mirrored or nonmirrored pool and detach command to detach disks from a mirrored pool. For zfs, multiple disks will be configured as mirrors, so the disk you choose. Setting up a zfs mirror 9 minute read lately i have been performing upgrades to the hard drives in my computers.
Or detach one of mirror disks, repartition with slice 0, attach. In your case, it looks like you are creating mirror from 2 different controller disk unit so you have to create 1 lun in each and add to the zpool as mirror. It does have the additional feature of having checksuming to prevent silent data corruption, but essentially it is the same as raid10. Below is how i was able to mirror the os and migrate to a new syspool disk with out taking any downtime. I mean, there mustve been a reason i started creating. Its look like you system work in some vrtual environment. Name state read write cksum test degraded 0 0 0 mirror degraded 0 0 0 spare degraded 0 0 0. You can attach a log device to an existing log device to create a mirrored log device. You should also use disk gptlabels whenever possible. In case x86, you need create solaris partitions on disk d1. Mar 09, 2012 hi i had detached the mirror c1t1d0s6 from the zpool zones. Admittedly, i am a complete linux noob and my knowledge pertains to googling and copy and pasting commands into the terminal.
This should be possible with the zpool attach and zpool detach command. I tried to dry run zpool add n mypool c0t1d0s7 mirror. You can also add a spare disk to the zfs pool using the below command, by adding a spare device to a zfs pool. We attach disk3 to the existing disk in the mirror. Creating a new pool by splitting a mirrored zfs storage pool. Data will be copied from disk2 to disk3 in this case. Zfs block size error on single disk in a mirror0 pool. Zfs didnt automatically pick it up and add to the zpool. I wanted to replace a disk and ended up detaching one disk in a mirror leaving a single remaining disk. Formatting disks for zfs on linux servethehome forums. I have a 1 tb data disk no boot data created in the past, with a snapshot history. How i replace a failedfailing hdd in a zfs storage pool.
If you are attaching a disk to create a mirrored root pool, see how to create a mirrored. Strange is, after this command the new disk sdc is now a zfs member. Once a spare replacement is initiated, a new spare vdev is created within the configuration that will remain there until the original device is replaced. This guide describes adding a zfs mirror drive to an existing zfs zpool for improved availability read. Originally, zfs was proprietary, closedsource software developed internally by sun. Name state read write cksum rpool online 0 0 0 c0t0d0s0 online 0 0 0 zpool attach wont work. This comes in handy to increase the size of the rpool. Similarly, you cannot modify an exiting raidzraidz2 vdev. If zfs is already telling you its a 4k disk, you shouldnt even need to set that sysctl, it should use 4k automatically. Iirc for a singledisk pool to be converted into a mirror you only specify zpool attach. Ive used zfs replace to swap drives in mirrors, but now its sdb and the old one was sdb so i dont know how thatd work. How to configure a mirrored root pool sparc or x86vtoc. Use fdisk to see partition of c0d0 and after cretae same on c0d1. The hard drive related project today is setting up a zfs mirror on my desktop which will contain my home directory.
If you did not create a mirrored zfs root pool during installation, you can easily create one after the installation. Designating a device as a hot spare means that the device is not an active device in a pool, but if an active device in the pool fails, the. It writes the metadata for a file to a very fast ssd drive to increase the write throughput of the system. Does anyone know how to add the device and create mirror to existing pool. Cannot create zpool using links in devdiskbyid issue. So we will need to attach the disk as a mirror of c8t0d0s0. Instead of using the zfs add command to add a second stripe to the pool, i could have instead used the attach option to create a two way mirror from the existing device. Now, when we run the status subcommand we will see that the mirror has been resilvered or the data copied to the new drive. You would need to use the zpool attach command to append the disks to the existing vdev, but you cant use a mirroredpair to back a single disk, you would have to add a new 2tb disk to make it a mirrored pair. Sep 21, 2012 sometimes you may wish to expand a twoway mirror to a threeway mirror, or to make a basic single drive vdev into a mirror to do this we use the zpool attach command. The problem is that c8t1d0 does not have a slice, so we can either create one using partition in format, or we can clone the slice from c8t0d0s0. Zfs root mirroring, unable to attach mirror disk nik jan, 2012 2.
Clonezilla is a free disk mirroring software which can be used for disk imaging and cloning. The mirrored log device in the previous example can be removed by specifying the mirror1 argument. Disk 1 above is the new disk i need to attach to expand my root pool give exporthome some extra space. Because you issued zpool attach f rpool c0d0 c0d1 first, zfs would have put an efi label on the c0d1 disk which is why the second command failed. This is shown in the below example, where you are replacing disk c1t1d0 in the pool named datapool with disk c1t2d0. First present a new disk to the server and rescan for the disk. Feb 16, 2012 i then wanted to mirror each disk to create a raid10 like pool however this is what i got when trying to attach the first mirror. No fsck8 or similar file system consistency check program is required to. Finally destroy the old pool and attach the old disk to the new pool.
Adding devices to a storage pool managing zfs file. Thus zpool create pool disk1 created a nonredundant pool with a single nonredundant vdev, and zpool attach pool disk2 would create a mirror pool made up of two nonredundant vdevs. Rightclick the primary drive with data on it, and select add mirror. Ea14d367371a114c827019c3e3f51c2c device start end sectors size type devsdb1 2048 1953507327.
With solaris 11, oracle introduces the new zpool split command to split the zfs pool sparc x86. The following screens will only allow you to install a zfs root system, not. The attach operation will cause a new top level mirror vdev virtual device to be created, and both devices will then be. How to add a drive to a zfs mirror switched on tech design. You should also use diskgptlabels whenever possible. Because the drive was used previously, it does have partitions on it. There are basically two ways of growing a zfs pool. All is now good, so lets attach mirror our system disks. How to increase rpool size on solaris 11 requires a reboot. How to replace a disk under zfs in solaris the geek diary. Its done with zpool add which has basically the same syntax as zpool create does for specifying storage, and it works well for what it does zfs wont rebalance your stored data automatically, but it will start to write any new data to the new vdevs until the new vdev. This disk space is immediately available to all datasets in the pool. Zfs replacing all disks in a zfs mirror without taking it. Online the device using zpool online or replace the device with zpool replace.
Since cfgadm only knows about hardware, not software slices. If you are attaching a disk to create a mirrored root pool, see how to create a mirrored root pool post installation. Attach the missing device and online it using zpool online. Please note that you can also share the spare device among multiple zfs pools. Name state read write cksum mypool online 0 0 0 ada0p3 online 0 0 0 errors. For information about replacing a disk in root pool, see how to replace a disk in the zfs root pool. Log devices can be removed by using the zpool remove command. Introduction when installing freebsd on a disk the availability of your system hinges on the correct operation of that disk. Zfs software raidz1, raidz2, raidz3 distributed parity based raid. Zfs root mirroring, unable to attach mirror disk oracle. Hello, how to add mirrored disk to newly installed solaris 10. If i did, i would have either made a 7tb pool of two mirrors, or put 4 disks in one mirror, then removed the old disk. The post describes steps to replace a failed disk in rpool for x86 based systems.
Attach a second disk to configure a mirrored root pool. Splitting a mirrored zfs pool in zfs on linux utcc. The pool can still be used, but some features are unavailable. How do i create a zpool using uuid or truly unique identifier. You can only add new vdevs, and you attach detach mirror disks.
Name state read write cksum geekpool degraded 0 0 0 mirror degraded 0 0 0 c1t12d0s1 online 0 0 0 c3t21d0s1 unavail 0 29 0 cannot open. Unfortunately i saw the problem only after the next reboot so now the drive label is missing and i cant replace the disk using the official instructions here and here. Select disks on this screen you must select the disks for installing solaris software. After a standard install of oracle solaris 11 express, well have our. Detach the failing drive from the pool call this drive failing remove failing from the chassis. Copy the smi label from c0d0 to c0d1 and use zpool attach f rpool c0d0s0 c0d1s0 instead. Adding a mirror to a device in a zfs pool prefetch. You will have to replicate the current zpool devices partition table to the device you want to attach and then randomize the unique guids of the partitions should be two. Dont forget to setup boot code or anything like that.
Then you can use zfs sendrecv to migrate the data over. It provides system deployment, recovery, baremetal backup, image encryption and supports many file systems. Iirc when i started playing with zfs, zpool create wouldnt work unless the disk had a gpt label. For the replacement operation to be successful, the replacement device must be greater than or equal to the minimum size of all the devices in a mirror or raidz configuration. This is what user13275 is suggesting in their answer.
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