Re: Script to save array info

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


Jose Manuel dos Santos Calhariz wrote:
> On Wed, Jun 20, 2012 at 07:21:49PM -0400, Wakko Warner wrote:
> > After reading some of the stories about lost metadata, I was wondering if
> > anyone had a script that would output the member info for each device with
> > the device's physical serial number.
> > 
> > For a crude one I did this while in /sys/block:
> > for x in sd*;do
> > 	echo /dev/$x
> > 	/lib/udev/scsi_id --export --page=0x80 --whitelisted /dev/$x
> > 	mdadm -E /dev/$x
> > done
> > 
> > And saved the output.  It works for me because all but 3 of my raid members
> > are full disks.
> 
> I made a script for myself, that collects the information by
> inspecting /sys instead of doing mdadm -E.  The script see all mdraid
> devices and all devices that belong to a mdraid.  I would like to know
> if the script works or not.  It works for me.

I've looked into /sys/block/md*/md before.  I've noticed there is
information not present in the output.

I just checked.  About the only thing important to me would be the "name"
that mdadm -E lists.  I don't know how important UUIDs would be but it could
be.

Looks like your script does essentially this one liner:
find /sys/block/md*/md -type f | xargs grep .

I didn't run it though.  I think yours added the ls -l of the rdX/block/
link.
I looked through everything in the block for some of my devices and none had
the serial number.  I had to use scsi_id from udev to get it.

One thing you might want to do to yours is "exec >> ${FILEMD}" instead of all
the >> ${FILEMD} that you had in your file.

-- 
 Microsoft has beaten Volkswagen's world record.  Volkswagen only created 22
 million bugs.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[ATA RAID]     [Linux SCSI Target Infrastructure]     [Managing RAID on Linux]     [Linux IDE]     [Linux SCSI]     [Linux Hams]     [Device-Mapper]     [Kernel]     [Linux Books]     [Linux Admin]     [Linux Net]     [GFS]     [RPM]     [git]     [Photos]     [Yosemite Photos]     [Yosemite News]     [AMD 64]     [Linux Networking]

Add to Google Powered by Linux