Разборки с Adaptec: Staggered spin up does not work
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Serial Attached SCSI (SAS) Adaptec RAID 31605
Operating System
Windows Server 2008 x64
Customer
I'm planning to assemble a system with Adaptec ASR-31605 SAS RAID controller and 16 directly attached wd1000fyps drives. Now I have 4 of them. I need Staggered spin up function but following WD instruction to put a jumper on and enable power management.
http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/popup_adp.php?p_faqid=958&p_created=1050530240
It doesn't help - drives continue to spin up immediately after power on.
The WD support said the following:
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You need to insure that the controller that you are using. The only option that we have is the jumper setting, and to have multiple drives not function correctly leads us to believe it is not the drive that is not powering them up in the fashion you want.
The controller is what tells the drive to spin up, when it gets power. If it was one drive out of 5, or even 2 or 3 out of 10. Then we might think that it was that particular drive. But to have all the drives do the same thing, leads us to look at the controller as being the point of contention. There is less chance of the drives having a fault then the controller, because of the number of drives having the same issue.
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Unfortunately, i didn't found any instructions about Staggered spin function in the controller manual. So, could you tell me, where's the problem? In HDD or controller configuration?
Response
Greetings from Adaptec Technical Support!
Thank you for your message, we're sorry for the delayed reply. Staggered spin should be controlled by the drive itself whether it powers on system power or on command. There is no setting in the controller BIOS or software to control this function. I have passed the information you provided from Western Digital to engineering for their comments.
Thank you for using Adaptec's ASK US Support Service.
Response
Greetings from Adaptec Technical Support!
The 31205 and 31605 controllers are programmed to stagger spinup of direct attached drives automatically. We will start unit to groups of 6 drives at a time in .5 second intervals. This is not a user definable selection. Since you only have 4 drives total, all will spinup at the same time by design.
Thank you for using Adaptec's ASK US Support Service.
Customer
Unfortunately I could get only 4 Seagete Barracuda drives which doesn't support staggered spin up. I've tried different ways of linking, but all 8 drives spins up simultaneously just after server power on.
Could you explain in detail the principle of staggered spinup operation?
Delay is 0.5 second, not 5?
How does drives division organized - 6 drives are strictly 4 lines on 1 connector + 2 on the second, or they are the first 6 drives detected?
And when they supposed to spin up? After server power on or after controller kernel boot?
Response
Greetings from Adaptec Technical Support!
Thank you for the additional information. All 8 drives would need to support staggered spin up to see any change. We will start spinning the drives in groups of 6 dependent on the phy assignment spinning the lower phy's first. The spin up is in .5 or half second intervals. The spin up should begin when you see the controller post.
Thank you for using Adaptec's ASK US Support Service.
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