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тАО04-28-2005 12:40 AM
тАО04-28-2005 12:40 AM
Proliant 8000 & 72GB Ultra320 drives
Are they compatible? I am using a SA4250ES controller.
IS it possible that the 4250ES is slowing down the Ultra320 drives, thereby slowing down performance?
BACKGROUND:
I replaced a Raid0 array made up of 3 - 18.2GB Ultra3 drives with 3 72GB Ultra320 drives on a Proliant 8000 that is using a 4250ES as its controller.
IS it possible that the 4250ES is slowing down the Ultra320 drives, thereby slowing down performance?
BACKGROUND:
I replaced a Raid0 array made up of 3 - 18.2GB Ultra3 drives with 3 72GB Ultra320 drives on a Proliant 8000 that is using a 4250ES as its controller.
3 REPLIES 3
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тАО04-28-2005 01:30 PM
тАО04-28-2005 01:30 PM
Re: Proliant 8000 & 72GB Ultra320 drives
Hi Ed,
This controller is a Wide Ultra2 SCSI (running in Wide-Ultra SCSI-3 mode) which is not really a true Ultra 3. The logic here is whenever you mix a controller and hard drive with different transfer rate, the transfer rate will be negotiated to work together with the slowest speed. Therefore, these ultra 320 hard drives will negotiate to work with the 4250ES controller to run by the slowest speed which will be the controllers speed mentioned above.
Regards
Amha Kassa
This controller is a Wide Ultra2 SCSI (running in Wide-Ultra SCSI-3 mode) which is not really a true Ultra 3. The logic here is whenever you mix a controller and hard drive with different transfer rate, the transfer rate will be negotiated to work together with the slowest speed. Therefore, these ultra 320 hard drives will negotiate to work with the 4250ES controller to run by the slowest speed which will be the controllers speed mentioned above.
Regards
Amha Kassa
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тАО04-29-2005 02:19 AM
тАО04-29-2005 02:19 AM
Re: Proliant 8000 & 72GB Ultra320 drives
But will it cause a performance issue for anything that tries to run any against that drive(whether it be copy from , copy to, etc...)?
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тАО04-29-2005 06:29 AM
тАО04-29-2005 06:29 AM
Re: Proliant 8000 & 72GB Ultra320 drives
Hi Ed,
I don't believe so but still I would like to stress that you don't have to expet the Ultr320 transfer rate. It still run by the controller(which is the lowest transfer rate in this case).
Regards
Amha Kassa
I don't believe so but still I would like to stress that you don't have to expet the Ultr320 transfer rate. It still run by the controller(which is the lowest transfer rate in this case).
Regards
Amha Kassa
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