arbitrary "mdadm" and "mount/umount"
commands using sudo.
--
Michael Schwarz
> This isn't really an answer to your question, but isn't this an ideal
> application for sudo? Make a shell script with the mdadm command(s) you
> want. And set it up so apache or wha
quot;thank you" to everyone who works on Linux software RAID. I
have had a complete BLAST using the feature. I now routinely make 2-3 USB
drive RAID 0 arrays just for fun (and faster write speed!).
It is a very nice feature and set of tools!
--
Michael Schwarz
-
To unsubscribe from t
Comments below.
--
Michael Schwarz
> On Mon, 19 Mar 2007, Michael Schwarz wrote:
>
>> I'm going to hang on to the hardware. This is a pilot/demo that may lead
>> to development of a new device, and, if so, I'll be getting back into
>> device driver writing. W
en to have some URLs handy, they'd be
appreciated.
YET AGAIN thank you both! You've been of great help.
--
Michael Schwarz
> Michael Schwarz wrote:
>> More than ever, I am convinced that it is actually a hardware problem,
>> but
>> I am curious for the opinio
t me know if you'd like those
dmesg logs or if you'd just like to let it go!
--
Michael Schwarz
> On Sunday March 18, [EMAIL PROTECTED] wrote:
>> cp -rv /mnt/* fs2d2/
>>
>> At this point, the process hangs. So I ran:
>>
>> echo t > /proc/sysrq-trigge
or
to running the stack trace.
--
Michael Schwarz
> Okay. I've verified my hardware (by doing large write/reads to non-raid
> file systems on each of the seven USB flash drives on the hub).
>
> So this morning I booted cold and began gathering log data. I'm sending it
> to
and dmesg-5-*.
I'll send that to you two in a separate message.
If anyone else would like my logs, let me know.
--
Michael Schwarz
> Okay. I've verified my hardware (by doing large write/reads to non-raid
> file systems on each of the seven USB flash drives on the hub).
&g
I've tried both single and multiple files. The files are not sparse. They
are highly compressed files (mpeg files) that would, to the filesystem, be
nearly random with no repeated patterns or voids.
--
Michael Schwarz
> Michael Schwarz wrote:
>> Update:
>>
>> (For
ad cables, connectors, or flash drives that
would save you all a lot of hassle.
When I'm done with that, I'll again replicate my problem, grab the logs
straight from dmesg, and post another entry here. I'll even fire up kmail
or mutt to avoid bad formatting.
Thanks again.
--
Michael
Comments/questions below...
--
Michael Schwarz
>
> This isn't much help. The important processes here are khubd,
> usb-storage, and scsi_eh_*. Possibly some raid-related processes too, but
> I don't know which they would be.
I have no copy khubd running. What
f 7 USB drives and it seems to fail consistently no matter which.
Nonetheless, I'm beginning to think I'm dealing with a hardware issue, not
a kernel issue, just because it is so consistent.
Thanks again for all the help.
--
Michael Schwarz
> I'll try playing around with
he copy is hung. I'm
going to see if it is "positional" by copying the file that is "hung"
alone and see if it hangs in the same place on the same file, or if it
hangs later or what,,, There will be more posts from me. (Fair warning to
all!)
--
Michael Schwarz
> Ne
syscall_call+0x7/0xb
=======
--
Michael Schwarz
> My guess would be a locking bug in the usb storage driver or some
> lower level USB driver..
> A significant difference between raid0 and linear is that a largish IO
> will touch all drives for raid-0, but only one or two fo
omething obvious I'm
missing? Would it help to provide strace/ltrace/ptrace of the hanging copy
command?
Any help (including URLs of manuals I should RTFM) would be most welcome.
Thanks!
--
Michael Schwarz
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