Re: [tlug] automating SCSI (SATA) device add/remove

[Jawaad Mahmood <jawaad.mahmood@example.com>]

Would a python script for that help, or are you looking for a command to do it?

(probably could make a bash shell for the same thing but I've never tried)

Sent from my iPhone

On 2010/12/06, at 14:03, Kalin KOZHUHAROV <me.kalin@example.com> wrote:

> Hi,
> 
> I have been pondering for quite some time at easy ways to automate
> adding removal of SATA drives on my system with CLI.
> I use different eSATA enclosures or SATA "drawers".
> 
> Adding usually happens automatic, unless the drive happens to take too
> long to initialize... then I have to find the device (`dmesg`), then
> for a message like this:
> 
>       [451944.216906] ata5: hard resetting link
> 
> I have to do:
>      echo "- - -" >/sys/class/scsi_host/host4/scan
> (see the off-by-one, ata5 is host4)
> 
> 
> When I want to properly stop the drive before removing it, I have to do:
>    hdparm -Y /dev/sdc
>   echo 1 >/sys/bus/scsi/devices/host4/target4\:0\:0/4\:0\:0\:0/delete
> 
> Now, I got lost in /sys many times and I need help .... I guess there
> is a shorter way from /dev/sdc to xyz/delete
> 
> Can you point me to an easier way/command to do the following:
> 
> 1. (attach) When I see "ata5: hard resetting link" do COMMAND ata5 and
> have it rescan the host
> 2. (detach) When I want to detach sdf, do COMMAND2 sdf and have it
> powered down and remove the device from kernel
> 
> 
> Cheers,
> Kalin.
> 
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