hard drive - What types of SCSI connectors are these?
2014-04
mOrloff
I was given an old server and old storage array, and told that they go together.
My boss wants me to gain access and migrate all the old data to our current file server.
Knowing basically zilch about scsi, I'm looking for some help in properly identifying these connectors so that I can buy the correct cable.
Any and all tips/suggestions/side-thoughts would be greatly appreciated =D
ultrasawblade
From here
:
Looks like a (5) High Density DB 50-pin Screw Type and a (6) VHDCI 68-Pin type.
All of these are pretty old. Best of luck.
David Mackintosh
I have a CentOS 4.x server running software raid. The server has two scsi disks in hot-swap trays. mdadm reports that the raid has failed, and so I would like to replace it.
I examine /proc/mdstat, which tells me my two raid devices have components on disks sda and sdb. It also tells me that sdb is the one that failed.
I examine /proc/scsi/scsi, which tells me I have two physical devices, at SCSI IDs 0 0 0 0 and 0-0-1-0.
Because I want to do the change hot, I assume that sdb is 0-0-1-0. So I say:
# echo "scsi remove-single-device 0 0 1 0" > /proc/scsi/scsi
...and the computer barfs because sda has just been removed, leaving the system with no valid drives.
Now upon reflection, the way I got into this mess was the last time a drive failed, it was sda/0-0-0-0, and I did it the old-school way -- stop the computer, remove the dead drive, then boot off of the survivor in it's old slot. This left me with a computer that thought that sda was 0-0-1-0. I then obtained and inserted, hot, a replacement, and added it like so:
# echo "scsi add-single-device 0 0 0 0" > /proc/scsi/scsi
...which worked, which meant I could apply a disk label, partition, and reconstruct my raid arrays. This also meant that the computer thinks that sdb is 0-0-0-0. Now sdb dies again (350 days later, but that's another issue) and I have forgotten all this.
So. Assuming that both my memory and my records keeping skills are inadequate for reminding me that this has happened, is there a way that in future can I compare the scsi device names (0-0-$n-0) and associate them with named devices (sd$x)?
larsks
You can look in /sys/block/sda/device, which will have a symlink starting with scsi_device that identifies the device:
$ ls -d /sys/block/sda/device/scsi_device*
/sys/block/sda/device/scsi_device:0:0:0:0
Or you can look in /sys/bus/scsi/devices:
$ ls /sys/bus/scsi/devices/
0:0:0:0 1:0:0:0 2:0:0:0 3:0:0:0 7:0:0:0 8:0:0:0
Each entry here represents a SCSI device. Inside each directory is a symlink starting with block: that identifies the corresponding block device:
$ ls -d /sys/bus/scsi/devices/0\:0\:0\:0/block* /sys/bus/scsi/devices/0:0:0:0/block:sda