3ware drive hotswapping

3ware drive hotswapping

[Scott T. Smith]

I'm testing the ability of a 3ware 8506 card to hotswap SATA drives in
JBOD mode, and I'm having problems.

When I remove the drive, the device becomes inaccessible -- that's
obvious.  However, when I reinsert the drive, I can't access it.  I've
tried echoing 'scsi remove-single-device W X Y Z' followed by 'scsi
add-single-device W X Y Z'; the remove causes the /dev/sd* devices to
disappear, but the add does not create any /dev/sd* entries (I'm using
devfs -- though trying to access the devices through a mknod'd block
device doesn't help either).

What is the correct procedure to get a 2.6 kernel to integrate drives?

	Scott

RE: 3ware drive hotswapping

[Adam Radford]

Please make sure that:

1. You have support for /proc/scsi turned on in your kernel.
2. You have powered the drive back on after re-insertion.
3. You have a 3ware driver >= v1.02.00.032.

If it still doesn't work, email support@3ware.com

-Adam

-----Original Message-----
From: linux-raid-owner@vger.kernel.org
[mailto:linux-raid-owner@vger.kernel.org]On Behalf Of Scott T. Smith
Sent: Monday, June 21, 2004 6:06 PM
To: linux-raid@vger.kernel.org
Subject: 3ware drive hotswapping


I'm testing the ability of a 3ware 8506 card to hotswap SATA drives in
JBOD mode, and I'm having problems.

When I remove the drive, the device becomes inaccessible -- that's
obvious.  However, when I reinsert the drive, I can't access it.  I've
tried echoing 'scsi remove-single-device W X Y Z' followed by 'scsi
add-single-device W X Y Z'; the remove causes the /dev/sd* devices to
disappear, but the add does not create any /dev/sd* entries (I'm using
devfs -- though trying to access the devices through a mknod'd block
device doesn't help either).

What is the correct procedure to get a 2.6 kernel to integrate drives?

	Scott


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RE: 3ware drive hotswapping

[Scott T. Smith]

On Mon, 2004-06-21 at 18:17, Adam Radford wrote:
> Please make sure that:
> 
> 1. You have support for /proc/scsi turned on in your kernel.

yup (cat /proc/scsi/scsi shows lots of stuff, and
remove-single-device/add-single-device work for other drives).

> 2. You have powered the drive back on after re-insertion.

uh..... ummm..... how do I do that?

I was told the drives are not programmed to power on when the machine
powers on, but instead by the controller in order to prevent a power
surge on start (we have 24 disks); though for the life of me I can't
figure out where that is set (the Alt-3 screen on startup doesn't seem
to show any option regarding that).

> 3. You have a 3ware driver >= v1.02.00.032.

yup

	Scott

RE: 3ware drive hotswapping

[Scott T. Smith]

On Mon, 2004-06-21 at 18:17, Adam Radford wrote:
> Please make sure that:
> 
> 1. You have support for /proc/scsi turned on in your kernel.
> 2. You have powered the drive back on after re-insertion.
> 3. You have a 3ware driver >= v1.02.00.032.

nevermind, I see that I was supposed to use the 3ware CLI to rescan the
controller.  I guess there's no automatic handling of reinserted disks.

	Scott