man/man8/zpool-attach.8

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  29 .Dd May 15, 2020
  30 .Dt ZPOOL-ATTACH 8
  31 .Os
  32 .
  33 .Sh NAME
  34 .Nm zpool-attach
  35 .Nd attach new device to existing ZFS vdev
  36 .Sh SYNOPSIS
  37 .Nm zpool
  38 .Cm attach
  39 .Op Fl fsw
  40 .Oo Fl o Ar property Ns = Ns Ar value Oc
  41 .Ar pool device new_device
  42 .
  43 .Sh DESCRIPTION
  44 Attaches
  45 .Ar new_device
  46 to the existing
  47 .Ar device .
  48 The existing device cannot be part of a raidz configuration.
  49 If
  50 .Ar device
  51 is not currently part of a mirrored configuration,
  52 .Ar device
  53 automatically transforms into a two-way mirror of
  54 .Ar device
  55 and
  56 .Ar new_device .
  57 If
  58 .Ar device
  59 is part of a two-way mirror, attaching
  60 .Ar new_device
  61 creates a three-way mirror, and so on.
  62 In either case,
  63 .Ar new_device
  64 begins to resilver immediately and any running scrub is cancelled.
  65 .Bl -tag -width Ds
  66 .It Fl f
  67 Forces use of
  68 .Ar new_device ,
  69 even if it appears to be in use.
  70 Not all devices can be overridden in this manner.
  71 .It Fl o Ar property Ns = Ns Ar value
  72 Sets the given pool properties.
  73 See the
  74 .Xr zpoolprops 7
  75 manual page for a list of valid properties that can be set.
  76 The only property supported at the moment is
  77 .Sy ashift .
  78 .It Fl s
  79 The
  80 .Ar new_device
  81 is reconstructed sequentially to restore redundancy as quickly as possible.
  82 Checksums are not verfied during sequential reconstruction so a scrub is
  83 started when the resilver completes.
  84 Sequential reconstruction is not supported for raidz configurations.
  85 .It Fl w
  86 Waits until
  87 .Ar new_device
  88 has finished resilvering before returning.
  89 .El
  90 .
  91 .Sh SEE ALSO
  92 .Xr zpool-add 8 ,
  93 .Xr zpool-detach 8 ,
  94 .Xr zpool-import 8 ,
  95 .Xr zpool-initialize 8 ,
  96 .Xr zpool-online 8 ,
  97 .Xr zpool-replace 8 ,
  98 .Xr zpool-resilver 8