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тАО11-18-2002 04:25 AM
тАО11-18-2002 04:25 AM
Activity on MSA1000 disks when no IO is done - Why?
Hi!
On a MSA1000 with one or more RAID1 arrays I keep seeing activity on the disks - even after the initial build of the arrays and with all servers shut down. Does anyone know why - and is there a official document concerning this (customer demand :-)
Thanx in advance
Carsten
On a MSA1000 with one or more RAID1 arrays I keep seeing activity on the disks - even after the initial build of the arrays and with all servers shut down. Does anyone know why - and is there a official document concerning this (customer demand :-)
Thanx in advance
Carsten
3 REPLIES 3
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тАО11-18-2002 05:02 AM
тАО11-18-2002 05:02 AM
Re: Activity on MSA1000 disks when no IO is done - Why?
...
to be a little more precise:
I see constant activity on the RAID1 arrays - one at a time - for something like 10-15 minutes - then this constant activity "moves" to the next RAID1 array. Could this be some kind of automatic media/redundancy check performed on RAID1 (and maybe RAID5) arrays (disks i RAID0 arrays don't show this behavior)?
/Carsten
to be a little more precise:
I see constant activity on the RAID1 arrays - one at a time - for something like 10-15 minutes - then this constant activity "moves" to the next RAID1 array. Could this be some kind of automatic media/redundancy check performed on RAID1 (and maybe RAID5) arrays (disks i RAID0 arrays don't show this behavior)?
/Carsten
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тАО11-18-2002 08:19 AM
тАО11-18-2002 08:19 AM
Re: Activity on MSA1000 disks when no IO is done - Why?
Carsten,
I couldn't find much on it, but it's probably doing a redundancy check. Place a call to see if that's the case.
live free or die
harry
I couldn't find much on it, but it's probably doing a redundancy check. Place a call to see if that's the case.
live free or die
harry
Live Free or Die
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тАО11-19-2002 01:57 AM
тАО11-19-2002 01:57 AM
Re: Activity on MSA1000 disks when no IO is done - Why?
I have now checked with Compaq (sorry HP) and they confirm that it is "Dynamic Sector Repair" going on - when there is no IO from the servers.
Haven't been able to find it documented anywhere though.
/Carsten
Haven't been able to find it documented anywhere though.
/Carsten
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