Messages in this thread | | | Date | Wed, 09 Jul 2003 17:50:10 -0700 | From | Samuel Flory <> | Subject | Re: Promise SATA 150 TX2 plus |
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Milan Roubal wrote:
>So what about the main advantage of SATA, that is hot-swap? > Hot swap is really only in the second SATA spec. Also hotswap is generally only support on scsi devices, usb devices, and raid controllers.
>Is it possible to make hotswap in the linux and change it for the >same disk? > You used to be able to hot swap with sca scsi drives doing the following:
1)Echo some wierd command to /proc/scsi/scsi to remove the device. 2)Physically swap drives 3)Echo some wierd command to /proc/scsi/scsi to add the device.
See scsi.c 3rd, and 4th instances of the word "echo" for details.
Of course a number of scsi raid controllers support of replacing of failed drives, and automagic rebuild on the new drive. This requires a saf-te backplane, and a saf-te compatible raid controller.
In theroy you can do this on a 3ware pata, and sata controller with the 7.6 firmware, the 7.6 cli, and ide hotswap backplane. Personally I've never tried it with a jbod drive.
>Or is it possible to change it for other disk with other >geometry? Is it depending on SATA controller or I only need >support in the linux kernel? Is there that support for this >controllers/drives? > > If might be possible if you had a controller that supported the 2nd sata spec, a hot swap drive carrier and used the ata-scsi driver. Then the same echo trick for scsi might work. More likely bad things would occur.
-- Once you have their hardware. Never give it back. (The First Rule of Hardware Acquisition) Sam Flory <sflory@rackable.com>
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