DroboPro w/ iscsi

[aac]

Has anybody tested out ext3 w/ lun sizes > 2TB recently. Any issues.
I would like to make a 8tb and 16tb lun (two drobopros).

There seems to be some confusion because of the usb/firewire issues.

[ElliotA]

We've been using a drobopro with 8TB LUN size, ext3 on ubuntu hardy
for a few weeks. Everything seemed fine, but it appears that after
going over 2TB of data (maybe 50% usage as noted with drobom status,
we're still investigating) we can no longer recover space after
deleting and all writes (maybe reads) have become extremely slow.

[Andrew Chalaturnyk]

Thanks,  I have been trying to test out an 8tb lun / partition w/ ext3 as well.   

Using a backup server I rsync'd over about 300 gb of small (4k ish) files and made some

dummy files over 100 gb ( by using something like   yes `date`  `date` `date`| dd of=tmp   , more date strings seemed to

up the throughput, I get on average of 30-40 mb/s this way for writes.)  

Once I get over 1tb, I deleted the tree of small files (very slow).  Even after 12 hrs no space was recovered by the

drobopro (as reported via the latest droboutils branch).  At this point I figured what the hell and toasted the partition with

dd if=/dev/zero of=/dev/sdc bs=512 count=1, and then recreated the partition and started over with the same process of

copy files (as above).  The drobopro is reporting even more space used and has not recovered anything.  I am going

to toast the lun and try again.  I would really like to use 8tb lun without worries.  I did an fsck (-f) on the initial partition before wiping and no errors were reported (very slow though).  

Have you tried a 16 tb lun/ partition?

Sorry if the post started to ramble, need some coffee.

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[ElliotA]

We did try a 16TB LUN, it had serious issues which aren't coming to me
right now, but it was on the order of not showing up after the initial
format.

[Andrew Chalaturnyk]

I had that happen with an 8tb lun as well,  but the second try worked. (same mkfs.ext3 command and everything).  Next time it happens I am going to try and first reboot both the machine and the drobo before reformatting to check if maybe something was not sync'd.  

[ElliotA]

Remembering a slight bit more. It worked fine initially, then when we
started writing some large files to it it would just disconnect and
not be recognized again.

On Dec 10, 3:13 pm, Andrew Chalaturnyk <aacha...@gmail.com> wrote:
> I had that happen with an 8tb lun as well,  but the second try worked. (same
> mkfs.ext3 command and everything).  Next time it happens I am going to try
> and first reboot both the machine and the drobo before reformatting to check
> if maybe something was not sync'd.
>
>
>
> On Thu, Dec 10, 2009 at 1:39 PM, ElliotA <elliotand...@gmail.com> wrote:
> > We did try a 16TB LUN, it had serious issues which aren't coming to me
> > right now, but it was on the order of not showing up after the initial
> > format.
>
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