user feedback of drobo-utiles ; format empty LUN

[Walter Vermeir]

Hi,

I have a Drobo v2 (4 bay, using the USB connection). Ubuntu 10.4. I
wish to give some feedback about using drobo-utiles.

Note; this is feedback, not criticism

I started with a new drobo and one (1) 1GB HD. I used the GUI
Droboview to create a ext3 LUN of 2TB. I filled it up with data and
added HD's until there where 3 x 1TB and 1 x 1,5TB inside the drobo.

The Drobo reported that a large part of the available space was not
allocated. I was wrongly under the impression the Drobo would created
automatically new LUN's. So I needed to create a second one myself.

The warning on the "Format" tab of the GUI was clear; using that
function would clear the complete Drobo (and also not make a second
LUN). So I used the command line.

"Drobo 01" is device /dev/sdc/ ; the LUN that was in use and had my
data on it
Device /dev/sdd " was the empty one

It showed up as "no partitions" and NTFS as file system for drobom
info.

I could use gParted but I assumed it would be best to do it by means
of drobom because a Drobo is not just any hard disk.

I did;

walter@zwart:~$ sudo drobom -d /dev/sdd format ext3 PleaseEraseMyData
You asked nicely, so I will format ext3 as you requested
OK, I built the script but nothing is erased yet...
If you are really sure, go ahead and do: sh /tmp/fmtscript
walter@zwart:~$

When I checked that script before excuting it;

walter@zwart:~$ sudo cat /tmp/fmtscript
#!/bin/sh
parted -s /dev/sdc mklabel gpt
parted -s /dev/sdc mkpart ext2 0 100%
parted -s /dev/sdc print; sleep 5
mke2fs -j -i 262144 -L Drobo01 -m 0 -O sparse_super,^resize_inode /dev/
sdc1
parted -s /dev/sdd mklabel gpt
parted -s /dev/sdd mkpart ext2 0 100%
parted -s /dev/sdd print; sleep 5
mke2fs -j -i 262144 -L Drobo01 -m 0 -O sparse_super,^resize_inode /dev/
sdd1
walter@zwart:~$

... I realized that I was very lucky to have checked it because I
would have deleted all my data.

I used gParted to make a new LUN, what worked perfectly.

But drobom still reports;

query luninfo result:
(0, 2199023185920L, 2575828840448L, 'GPT', ['EXT3'])
(0, 0, 0, 'No Partitions', ['NTFS'])

... like there is no second LUN.

Question;

Why does drobom wants to format all LUN's even when you specify to
format a specific device?

Would some warning about that behavior not be appropriate?

Greetings,
Walter

[Peter Silva]

yup.  This documents what I want to change in the next 

release.  Currently drobo-utils really only works on a single lun.  Want to have next version understand multiple luns, and be able to add them into a catenated device (see other threads for device catenation.)

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