Problem with two SATA drives on GoFlex Net

Hi,

You guys seem like you have got a clue!

I have a small issue with my GoFlex Net.

The device has got two SATA ports, so I would expect there to be two symlinks under /dev/disk/by-path/ after plugging two drives in, one in each port. Never mind the usb stick on /dev/sda and it's partitions.

root@goflex:~# ls -l /dev/disk/by-path/
total 0
lrwxrwxrwx 1 root root  9 Jan  1  1970 platform-orion-ehci.0-usb-0:1:1.0-scsi-0:0:0:0 -> ../../sda
lrwxrwxrwx 1 root root 10 Jan  1  1970 platform-orion-ehci.0-usb-0:1:1.0-scsi-0:0:0:0-part1 -> ../../sda1
lrwxrwxrwx 1 root root 10 Jan  1  1970 platform-orion-ehci.0-usb-0:1:1.0-scsi-0:0:0:0-part2 -> ../../sda2
lrwxrwxrwx 1 root root  9 Jun 25 22:59 platform-sata_mv.0-scsi-0:0:0:0 -> ../../sdc

The SATA drives appear as /dev/sdb and /dev/sdc but it looks like the symlink "platform-sata_mv.0-scsi-0:0:0:0" is used for both of them and overwritten when I plug the second drive in.

I would expect one of the drives to show as "platform-sata_mv.0-scsi-1:0:0:0", as per ls /sys/class/scsi_disk/.

root@goflex:~# ls -l /sys/class/scsi_disk/
total 0
lrwxrwxrwx 1 root root 0 Jun 25 23:07 0:0:0:0 -> ../../devices/platform/sata_mv.0/ata1/host0/target0:0:0/0:0:0:0/scsi_disk/0:0:0:0
lrwxrwxrwx 1 root root 0 Jun 25 23:07 1:0:0:0 -> ../../devices/platform/sata_mv.0/ata2/host1/target1:0:0/1:0:0:0/scsi_disk/1:0:0:0
lrwxrwxrwx 1 root root 0 Jun 25 23:07 2:0:0:0 -> ../../devices/platform/orion-ehci.0/usb1/1-1/1-1:1.0/host2/target2:0:0/2:0:0:0/scsi_disk/2:0:0:0

I assume the symlinks under /dev/disk/by-path/ are created by the kernel, possibly the sata_mv module. Does anyone have a clue what's going on or do you know of someone who could help me figure it out?
I need/want the symlinks to setup software raid locked to the two ports, not to UUIDs or partition labels.

I'm running kernel version 3.3.2 which I found in a .deb somewhere in a dusty corner of the internet.

root@goflex:~# uname -a
Linux goflex 3.3.2-kirkwood-dg #1 Mon Apr 23 17:09:27 CDT 2012 armv5tel GNU/Linux

Regards,

xpress

You could try this kernel:
http://forum.doozan.com/read.php?2,12096

I don't have 2 SATA disks plugged in to do the test, so not sure if the sata_mv patch will fix this problem.

-bodhi
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I installed that kernel yesterday but the problem is still there.
Is there a topic for howto check out the source for the kernel anywhere on this forum?

xpress Wrote:
-------------------------------------------------------
> I installed that kernel yesterday but the problem
> is still there.

I had tried this with the 2nd SATA disk, and this problem indeed occurs for my GoFlexNet too. Never noticed before! I'll look around to see if people have reported it on Arch site. Also, only the 2nd SATA port is working for booting.

-bodhi
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I only discovered it because I want my raid setup based on the ports, so I can swap out a drive when (not if) it brakes and hopefully the raid will recover once a new drive has been inserted.