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How to mount Sas with a Linux rescue cd

Posted on 2006-06-29
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Last Modified: 2008-01-09
I have Trinity rescue cd which is a linux disk that can read ntfs.   I tried it at home and it works fine and I could boot from it to read the bootlog.txt on a windows box.

Problem is that I work on new machines at work and need to mount Sas drives.   It it like mount -t ntfs /dev/sas /mnt or something like this.  

I am running Trinity 3.1, should I be running something else ?

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Question by:bitmechanic
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pjedmond earned 500 total points
ID: 17012337
>I am running Trinity 3.1, should I be running something else ?

Answer - I don't know!

I've never used sas drives, but I do have a very good understanding of your problem. SAS is reasonably 'bleeding edge', and in many cases is not fully supported. Even where it is, the necessary modules are not always compiled into the kernel...and hence it won't work. So....with that out of the way...the best reference link I've found for this is:

http://linuxmafia.com/faq/Hardware/sas.html

It gives an idication of which modules are required for which SAS cards. In order to find out whether the modeule is loaded

lsmod

lists modules installed.

If the module is listed, then great. You are probably using the correct CD for this.

Next, have a very careful look through *every line* of the output of:

dmesg

This gives log inforation from the startup process. It may provide a clue as to whether a different driver is required, or alternatively, it will tell you what the sas drive is identified as. It may be /dev/sas, but I suspect that the sas drives are likely so start /dev/sda1 /dev/sda2 for the first drive and 2 partitions, and /dev/sdb1 etc for the second sas drive. Note that I may be wrong.

Trinity is an excellent recovery disc, however, if it shows no indication of the drives, you need to try another live CD. Knoppix is normally considered to be a leader in this field, and I'd be tempted to to try the latest Knoppix release.


......oh no I wouldn't! - I'd much rather install trinity on another PC, and build my own driver modules using the information from:

http://www.digitalhermit.com/linux/Kernel-Build-HOWTO.html

..or even make my own distro just for the sake of it.......or perhaps not!

Once you've got this far, you'll be able to mount:

mount -t ntfs /dev/sda1  /mnt                      (obviously change /dev/sdxy to taste)

I'm interested in knowing how this goes!

(   (()
(`-' _\
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by:bitmechanic
ID: 17047655

I learned the Darn Installer will not do a bootlog.txt so it is pretty clear that I can not boot from a CD and read the file ( that does not exhist )
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