diff options
Diffstat (limited to 'mdadm.8.in')
| -rw-r--r-- | mdadm.8.in | 18 |
1 files changed, 17 insertions, 1 deletions
@@ -838,6 +838,22 @@ array is resynced at creation. From Linux version 3.0, can be used with that command to avoid the automatic resync. .TP +.BR \-\-write-zeroes +When creating an array, send write zeroes requests to all the block +devices. This should zero the data area on all disks such that the +initial sync is not necessary and, if successfull, will behave +as if +.B \-\-assume\-clean +was specified. +.IP +This is intended for use with devices that have hardware offload for +zeroing, but despite this zeroing can still take several minutes for +large disks. Thus a message is printed before and after zeroing and +each disk is zeroed in parallel with the others. +.IP +This is only meaningful with --create. + +.TP .BR \-\-backup\-file= This is needed when .B \-\-grow @@ -1370,7 +1386,7 @@ and .B layout\-alternate options are for RAID0 arrays with non-uniform devices size that were in use before Linux 5.4. If the array was being used with Linux 3.13 or -earlier, then to assemble the array on a new kernel, +earlier, then to assemble the array on a new kernel, .B \-\-update=layout\-original must be given. If the array was created and used with a kernel from Linux 3.14 to Linux 5.3, then |