ZFS lands in Debian contrib

Re:ZFS lands in Debian contrib by Annatar on Sunday May 15, 2016 @05:51AM (#11700192)

> It does not support different sized drives in a raidz

  % mkfile -v 64m /var/tmp/d0
  /var/tmp/d0 67108864 bytes
  % mkfile -v 96m /var/tmp/d1
  /var/tmp/d1 100663296 bytes
  % mkfile -v 128m /var/tmp/d2
  /var/tmp/d2 134217728 bytes
  % sudo zpool create -f pool0 raidz /var/tmp/d0 /var/tmp/d1 /var/tmp/d2
  Password:
  % zpool status
    pool: pool0
   state: ONLINE
    scan: none requested
  config:

        NAME             STATE     READ WRITE CKSUM
        pool0            ONLINE       0     0     0
          raidz1-0       ONLINE       0     0     0
            /var/tmp/d0  ONLINE       0     0     0
            /var/tmp/d1  ONLINE       0     0     0
            /var/tmp/d2  ONLINE       0     0     0

  errors: No known data errors

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Re:ZFS lands in Debian contrib by stewartbutler on Tuesday May 17, 2016 @09:20PM (#11719029)

You can build it, but it is limited to the smallest device in the vdev, so the array will appear to only have three devices of 64m available. Though you can replace all smaller disks and grow it.

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Re:ZFS lands in Debian contrib by Annatar on Wednesday May 18, 2016 @05:20AM (#11720692)

That is not how RAIDZ works. Because every write is a dynamic width stripe, the capacity is an aggregate minus parity, not linear.

The smallest device capacity applies to RAID1+0, which is mirroring, but it does not apply to RAIDZ.

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