>>2007/12/27, Cody Yellan <cody@xxxxxxxxxxxxx>:
>>> I had a 4x500GB SATA2 array, md0. I added one 500GB drive and
>>> reshaping began at ~2500K/sec. Changing
>>> /proc/sys/dev/raid/speed_limit_m{in,ax} or
>>> /sys/block/md0/md/sync_speed_m{in,ax} had no effect. I shut down
>all
>>> unnecessary services and the array is offline (not mounted). I
>have
>>> read that the throttling code is "fragile" (esp. with regard to
>>> raid5) but does this make sense? I will wait (in)patiently for it
>to
>>> finish, but I do wonder why the configuration parameters have no
>>> effect. This is a dual quad 2GHz Xeon machine with 8GB of memory
>>> running RHEL5. Is this the maximum speed?
>>>
>>I think you may check each SATA2 disk to make sure they are working
>fine.
>>I had a similar situation and it turned out to be caused by one of
>>disks in array. It is a failed disk indicated by its S.M.A.R.T
>>information.
No problems indicated by SMART but I did have some concerns about the
drive I added. It contained some data so I tried to delete the
partition and create a new filesystem-free partition. Both parted
and fdisk simply restored the already existing partition, complete
with the data. So I just added that drive, figuring mdadm would
overwrite the partition. It worked but from now on I will try to
use only blank disks.
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