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тАО05-12-2005 07:45 PM
тАО05-12-2005 07:45 PM
Raid 4Si question
My customer just bought an rp5470 with a Raid 4Si card installed, connected to a DS2300 with 1 controller with 5 146Gb disks in full bus mode using only 1 controller from the Raid 4Si card.
We would like to make a RAID 1 + 0 LUN using 4 of the 5 disks on the DS2300. I know that to do this, you need to span across arrays. What I did (since I do not have more than 1 controller on the ds2300, so split-bus mode is not an option) is to create 2 RAID 1 LUNS containing 2 disks each and on one of the LUNs I enabled spanning. The Raid 4si seemed happy with this config, and immediately the size of the LUN increased from 146 to 292Gb, so far so good.
However, I tried to dd on the device file created by the LUN and only disk 1 and disk 3 are flashing, not all 4 disks. I assume that to span, you need to span across controllers, but I tried to span using this method. Is it ok? or I need an additional controller on the ds2300 and put it in split-bus mode?
Please help me, points will be rewarded.
Vince
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тАО05-12-2005 11:14 PM
тАО05-12-2005 11:14 PM
Re: Raid 4Si question
Did you use dd for reading or writing to the disks ? If reading, it is not necessary with activity on all disks. On the other hand, if writing, all disks should be active if everything is OK.
I have no experience with your specific harware but I don't understand why it should not be possible to create a RAID 1+0 direct, using 1 or both of the SCSI controllers (buses) on the 4Si.
And, what do you mean with "controlers" for the DS2300. Is not the DS2300 a JBOD ?
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тАО05-12-2005 11:30 PM
тАО05-12-2005 11:30 PM
Re: Raid 4Si question
I only read to null using dd, I didn't write, I will check that.
By controllers I mean that the ds2300 comes with either 1 or 2 controllers (for fullbus/splitbus config). I have only 1 controller in mine.
Thanks,
Vince
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тАО05-18-2005 11:05 AM
тАО05-18-2005 11:05 AM
Re: Raid 4Si question
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тАО05-19-2005 06:43 PM
тАО05-19-2005 06:43 PM
Re: Raid 4Si question
Case is closed
Vince