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Legacy Forums => Experienced User Forum => Topic started by: James Shields on October 30, 2001, 04:21:00 PM

Title: Use hdparm with 3Ware RAID ?
Post by: James Shields on October 30, 2001, 04:21:00 PM

Successfully installed 3Ware 6410 RAID controller, with 2 x IBM 40Gb ATA100 7200rpm 2Mb cache Hard Drives, in RAID 1 mirror array.

Can I activate hdparm, and if so, will it activate for both drives ?

Title: Re: Use hdparm with 3Ware RAID ?
Post by: Dan Brown on October 30, 2001, 04:35:25 PM

Whether hdparm will work at all I don't know, but if it does, it will work for both drives.  As far as the OS is concerned, there's only one drive there to begin with.

Title: Re: Use hdparm with 3Ware RAID ?
Post by: Charlie Brady on October 30, 2001, 08:30:55 PM

Dan Brown wrote:
>
> Whether hdparm will work at all I don't know, but if it does,
> it will work for both drives.  As far as the OS is concerned,
> there's only one drive there to begin with.

And as far as the OS is concerned, that drive is a SCSI drive. I don't think that hdparm has any effect on SCSI drives. But you can run "hdparm .... /dev/sda" and find out :-)

Charlie

Title: Re: Use hdparm with 3Ware RAID ?
Post by: Chris O'Donovan on November 03, 2001, 04:45:25 AM

I believe that the command

/sbin/e-smith/config setprop hdparm status enabled
will still work on a raid array. And the commands

hdparm -d1 -m16 /dev/hda
hdparm -d1 -m16 /dev/hdb
also work. My raid went from less than 2MB/s to more than 13MB/s, which is still only one third of what I would expect from the hardware.
(I'm getting 35MB/s from similar hardware running Mandrade 8.1 on a single hard disk.)