One explanation might be that the disks are not identical. Dell will
sometimes ship different model drives depending on availability, or the
drives could have come with a different firmware version installed. You
might check with perccli to see if this is a possibility.
Also, some manufacturers may re-use the same model number to indicate a
drive of X capacity for X usage, but the internals for the drive could
change from year to year (WD is known for this). Something to check if
the drives report a subtly different model number, different date of
manufacture/location of manufacture, or have different style labels or
fonts from one server to another.
--Blake
On 5/18/2021 9:20 AM, Paul Raines wrote:
I recently bought two identical PowerEdge T640 with internal PERC
H730P Adapter and eighteen 16TB disks. I created a 17 disk RAID6 with
1 hot spare on both.
On the 1st server I created the RAID Sunday (May 16 16:20:13)
and on the 2nd server I creatd it Monday (May 17 11:23:45)
As of right now the 1st server RAID reports 9% complete while
the 2nd server RAID reports 50% complete. Which is crazy since
the 1st has been running almost half a day longer!
I checked the BGI rate on both which are both the default 30%
There is no other activity on either server going on as I am
waiting for the init to finish.
I can find no errors or other clues in the logs I know to check.
All other aspects of the RAIDs are good (all disks report good)
A comparison of 'perccli64 /c0 show all' between the two shows
no differences in any settings.
Simple random-write 'fio' tests on both show slightly slower
on the first server compared to the second but only about 10-15%
Anyone have any clues as to why the huge slowness on the
initialization on the first server?
---------------------------------------------------------------
Paul Raines http://help.nmr.mgh.harvard.edu
MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging
149 (2301) 13th Street Charlestown, MA 02129 USA
_______________________________________________
Linux-PowerEdge mailing list
[email protected]
https://lists.us.dell.com/mailman/listinfo/linux-poweredge
_______________________________________________
Linux-PowerEdge mailing list
[email protected]
https://lists.us.dell.com/mailman/listinfo/linux-poweredge
