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11-13-2001 10:16 AM
11-13-2001 10:16 AM
Hello,
I was wondering if someone could provide me with some advice/information re: HP NetRAID controllers and if there are any limits to the number of drives that can be added to a Logical Drive/Array. I have reviewed HP's documentation on configuring NetRAID controllers and it indicated that the drive stripes only had an effect on performance, but didn't mention anything about a minimum stripe size for dynamically adding capacity.
When I attempted to add an extra drive to an existing logical drive on our LXr Pro, I encountered a message indicating that "Maximum STRIPE number reached".
Here's the config information:
Software (on NT 4.0 Server): NetRAID Assistant V 1.02.02
Hardware: HP NetServer LXr Pro + NetServer Rack Storage /8
Stripe size on LD1 is 8K Bytes
#stripes: 8
Configuration:
The two physical drives I want to add to the logical drive are on Channel 0 (as #10 and #11).
The Logical Device is Array 1, LD1:RAID5:60738MB
When attempting to add capacity, NetRAID assistant asks:
Add selected physical drive(s) to selected Logical Drive?
This then results in a message "Maximum STRIPE number reached".
Having read the other messages here, it *seems* that I would have to wipe the existing partition and then up the stripe size to 64K. Does anyone know a way around this, or is it actually necessary in this case?
Much obliged,
Dave.
I was wondering if someone could provide me with some advice/information re: HP NetRAID controllers and if there are any limits to the number of drives that can be added to a Logical Drive/Array. I have reviewed HP's documentation on configuring NetRAID controllers and it indicated that the drive stripes only had an effect on performance, but didn't mention anything about a minimum stripe size for dynamically adding capacity.
When I attempted to add an extra drive to an existing logical drive on our LXr Pro, I encountered a message indicating that "Maximum STRIPE number reached".
Here's the config information:
Software (on NT 4.0 Server): NetRAID Assistant V 1.02.02
Hardware: HP NetServer LXr Pro + NetServer Rack Storage /8
Stripe size on LD1 is 8K Bytes
#stripes: 8
Configuration:
The two physical drives I want to add to the logical drive are on Channel 0 (as #10 and #11).
The Logical Device is Array 1, LD1:RAID5:60738MB
When attempting to add capacity, NetRAID assistant asks:
Add selected physical drive(s) to selected Logical Drive?
This then results in a message "Maximum STRIPE number reached".
Having read the other messages here, it *seems* that I would have to wipe the existing partition and then up the stripe size to 64K. Does anyone know a way around this, or is it actually necessary in this case?
Much obliged,
Dave.
Solved! Go to Solution.
1 REPLY 1
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11-14-2001 12:39 AM
11-14-2001 12:39 AM
Solution
David,
Unfortunately the maximum stripe number has nothing to do with the stripe size, but with the number of disks (stripes) in a RAID5.
The maximum number of disks for this type of netraid in a RAID5 is 8.
If you want a bigger logical drive, the only thing you can do is create a RAID50 (span 2 RAID5's) .
The disadvantage is that you have to clear the onfiguration first (so you loose all your data).
Another disadvantage of a RAID50 is that you're using 2 drives for redundancy, instead of 1 in a RAID5 so you're using less of your netto capacity.
Good luck,
Marco.
Unfortunately the maximum stripe number has nothing to do with the stripe size, but with the number of disks (stripes) in a RAID5.
The maximum number of disks for this type of netraid in a RAID5 is 8.
If you want a bigger logical drive, the only thing you can do is create a RAID50 (span 2 RAID5's) .
The disadvantage is that you have to clear the onfiguration first (so you loose all your data).
Another disadvantage of a RAID50 is that you're using 2 drives for redundancy, instead of 1 in a RAID5 so you're using less of your netto capacity.
Good luck,
Marco.
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