Drobo v2, 3x2TB=3.6 TB, which filesystem on Ubuntu?
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Olivier Bruchez
Jul 14, 2010, 3:16:11 AM7/14/10
to drobo-talk
I have a second-generation Drobo with three 2-TB harddrives, for a
total of 3.6 TB available for data, a MacBook Pro with Mac OS X and
Windows XP SP3 (and soon Windows 7), as well as another machine with
the latest version of Ubuntu.
I have been using my Drobo for months with Mac OS X, with a single 16-
TB LUN (HFS+, non-journaled). Now I'd like to use it on my Ubuntu
machine, but Ubuntu doesn't support HFS+ with volumes > 2 TB (larger
volumes were getting corrupted, apparently).
What are my best options? Is there any way to format a 8-TB or 16-TB
ext3 volume? Is it too risky? If performance is not an issue, what
about a 16-TB NTFS volume (formatted from Windows 7)? Any other
option?
Thanks for your help,
Olivier
total of 3.6 TB available for data, a MacBook Pro with Mac OS X and
Windows XP SP3 (and soon Windows 7), as well as another machine with
the latest version of Ubuntu.
I have been using my Drobo for months with Mac OS X, with a single 16-
TB LUN (HFS+, non-journaled). Now I'd like to use it on my Ubuntu
machine, but Ubuntu doesn't support HFS+ with volumes > 2 TB (larger
volumes were getting corrupted, apparently).
What are my best options? Is there any way to format a 8-TB or 16-TB
ext3 volume? Is it too risky? If performance is not an issue, what
about a 16-TB NTFS volume (formatted from Windows 7)? Any other
option?
Thanks for your help,
Olivier
Peter Silva
Jul 14, 2010, 6:21:23 AM7/14/10
to drobo...@googlegroups.com
http://drobo-utils.sourceforge.net/#compatibility-matrix
the only real option is a series of 2 TiB ext3 file systems.
There is a tool, pointed out to me by a helpful drobo user, called mhddfs in the standard debian/ubuntu repositories. It is a union file system, where all of the 2 TiB ext3's would be catenated together to make a meta file system. There is no reason why this should not work well, I'd like people to try it out and let me know how it goes for them. This is very likely the holy grail for v1 and v2 users.
So I think huge file system is possible. And better, when you add space, new LUNS will show up, you can just add them to the mhddfs file system, no destructive changes needed (as opposed to filling a LUN.)
This will also work with other file systems types (ntfs, fat, hpfs), as mhddfs operates above the file system layer. To other operating systems, each 2 TB LUN will be one file system that has part of the data on your humungous one. You can load each of the slices to get access to all the data, or you can network export (nfs/samba) the humungous one.
I am considering adding "mount point support" to the next drobo-utils, where it will try to determine a good set of mountpoints (with UUIDs etc...), and make mhddfs a no-brainer to apply.
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Olivier Bruchez
Jul 16, 2010, 6:45:19 AM7/16/10
to drobo-talk
mhddfs looks interesting... But I'm not sure I would feel "secure"
using it. After all, more people are using ntfs-3g than mhddfs, right?
Olivier
On Jul 14, 12:21 pm, Peter Silva <Peter.A.Si...@gmail.com> wrote:
> http://drobo-utils.sourceforge.net/#compatibility-matrix
> > .
using it. After all, more people are using ntfs-3g than mhddfs, right?
Olivier
On Jul 14, 12:21 pm, Peter Silva <Peter.A.Si...@gmail.com> wrote:
> http://drobo-utils.sourceforge.net/#compatibility-matrix
>
> <http://drobo-utils.sourceforge.net/#compatibility-matrix>basically, all
> options are 2 TiB limited on 2nd gen Drobo.
> the only real option is a series of 2 TiB ext3 file systems.
>
> There is a tool, pointed out to me by a helpful drobo user, called mhddfs in
> the standard debian/ubuntu repositories. It is a union file system, where
> all of the 2 TiB ext3's would be catenated together to make a meta file
> system. There is no reason why this should not work well, I'd like people
> to try it out and let me know how it goes for them. This is very likely the
> holy grail for v1 and v2 users.
>
> So I think huge file system is possible. And better, when you add space,
> new LUNS will show up, you can just add them to the mhddfs file system, no
> destructive changes needed (as opposed to filling a LUN.)
>
> This will also work with other file systems types (ntfs, fat, hpfs), as
> mhddfs operates above the file system layer. To other operating systems,
> each 2 TB LUN will be one file system that has part of the data on your
> humungous one. You can load each of the slices to get access to all the
> data, or you can network export (nfs/samba) the humungous one.
>
> I am considering adding "mount point support" to the next drobo-utils, where
> it will try to determine a good set of mountpoints (with UUIDs etc...), and
> make mhddfs a no-brainer to apply.
>
> On Wed, Jul 14, 2010 at 3:16 AM, Olivier Bruchez
> <olivier.bruc...@gmail.com>wrote:
> <http://drobo-utils.sourceforge.net/#compatibility-matrix>basically, all
> options are 2 TiB limited on 2nd gen Drobo.
> the only real option is a series of 2 TiB ext3 file systems.
>
> There is a tool, pointed out to me by a helpful drobo user, called mhddfs in
> the standard debian/ubuntu repositories. It is a union file system, where
> all of the 2 TiB ext3's would be catenated together to make a meta file
> system. There is no reason why this should not work well, I'd like people
> to try it out and let me know how it goes for them. This is very likely the
> holy grail for v1 and v2 users.
>
> So I think huge file system is possible. And better, when you add space,
> new LUNS will show up, you can just add them to the mhddfs file system, no
> destructive changes needed (as opposed to filling a LUN.)
>
> This will also work with other file systems types (ntfs, fat, hpfs), as
> mhddfs operates above the file system layer. To other operating systems,
> each 2 TB LUN will be one file system that has part of the data on your
> humungous one. You can load each of the slices to get access to all the
> data, or you can network export (nfs/samba) the humungous one.
>
> I am considering adding "mount point support" to the next drobo-utils, where
> it will try to determine a good set of mountpoints (with UUIDs etc...), and
> make mhddfs a no-brainer to apply.
>
> On Wed, Jul 14, 2010 at 3:16 AM, Olivier Bruchez
>
> > I have a second-generation Drobo with three 2-TB harddrives, for a
> > total of 3.6 TB available for data, a MacBook Pro with Mac OS X and
> > Windows XP SP3 (and soon Windows 7), as well as another machine with
> > the latest version of Ubuntu.
>
> > I have been using my Drobo for months with Mac OS X, with a single 16-
> > TB LUN (HFS+, non-journaled). Now I'd like to use it on my Ubuntu
> > machine, but Ubuntu doesn't support HFS+ with volumes > 2 TB (larger
> > volumes were getting corrupted, apparently).
>
> > What are my best options? Is there any way to format a 8-TB or 16-TB
> > ext3 volume? Is it too risky? If performance is not an issue, what
> > about a 16-TB NTFS volume (formatted from Windows 7)? Any other
> > option?
>
> > Thanks for your help,
> > Olivier
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "drobo-talk" group.
> > To post to this group, send email to drobo...@googlegroups.com.
> > To unsubscribe from this group, send email to
> > drobo-talk+...@googlegroups.com<drobo-talk%2Bunsu...@googlegroups.com>
> > I have a second-generation Drobo with three 2-TB harddrives, for a
> > total of 3.6 TB available for data, a MacBook Pro with Mac OS X and
> > Windows XP SP3 (and soon Windows 7), as well as another machine with
> > the latest version of Ubuntu.
>
> > I have been using my Drobo for months with Mac OS X, with a single 16-
> > TB LUN (HFS+, non-journaled). Now I'd like to use it on my Ubuntu
> > machine, but Ubuntu doesn't support HFS+ with volumes > 2 TB (larger
> > volumes were getting corrupted, apparently).
>
> > What are my best options? Is there any way to format a 8-TB or 16-TB
> > ext3 volume? Is it too risky? If performance is not an issue, what
> > about a 16-TB NTFS volume (formatted from Windows 7)? Any other
> > option?
>
> > Thanks for your help,
> > Olivier
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "drobo-talk" group.
> > To post to this group, send email to drobo...@googlegroups.com.
> > To unsubscribe from this group, send email to
> > .
Peter Silva
Jul 16, 2010, 7:39:00 AM7/16/10
to drobo...@googlegroups.com
mhddfs is just a layer that makes several underlying file systems look like a single one. the underlying file systems can be ext3, hfs+, or ntfs, or all three mixed together. if mhddfs is not available, you just have the separate file systems, each containing part of the data, and easily recoverable.
To unsubscribe from this group, send email to drobo-talk+...@googlegroups.com.
Julian Urquijo
Jul 20, 2010, 11:02:18 AM7/20/10
to drobo-talk
I'm in the process of switching from an old powerbook g4 server w/
drobo v2 , HFS+ 16TB lun to an atom330 running linux w/ drobo ext3
formatted, 2TB luns.
So far so good, the drobo is formatted ext3. Linux reports correct
free space, etc. Drobom status is good.
I'm using mhddfs to combine all drobo luns into one big pool of free
space.
Have copied approx 1.8TBs of data back onto drobo w/ no problems.
Will post back here once I cross the 2TB threshold onto the 2nd lun
and also with my experiences setting up an iscsi target on the drobo
for win7.
On Jul 16, 6:39 am, Peter Silva <Peter.A.Si...@gmail.com> wrote:
> mhddfs is just a layer that makes several underlying file systems look like
> a single one. the underlying file systems can be ext3, hfs+, or ntfs, or
> all three mixed together. if mhddfs is not available, you just have the
> separate file systems, each containing part of the data, and easily
> recoverable.
>
> On Fri, Jul 16, 2010 at 6:45 AM, Olivier Bruchez
> <olivier.bruc...@gmail.com>wrote:
> > <drobo-talk%2Bunsu...@googlegroups.com<drobo-talk%252Buns...@googlegroups.com>
drobo v2 , HFS+ 16TB lun to an atom330 running linux w/ drobo ext3
formatted, 2TB luns.
So far so good, the drobo is formatted ext3. Linux reports correct
free space, etc. Drobom status is good.
I'm using mhddfs to combine all drobo luns into one big pool of free
space.
Have copied approx 1.8TBs of data back onto drobo w/ no problems.
Will post back here once I cross the 2TB threshold onto the 2nd lun
and also with my experiences setting up an iscsi target on the drobo
for win7.
On Jul 16, 6:39 am, Peter Silva <Peter.A.Si...@gmail.com> wrote:
> mhddfs is just a layer that makes several underlying file systems look like
> a single one. the underlying file systems can be ext3, hfs+, or ntfs, or
> all three mixed together. if mhddfs is not available, you just have the
> separate file systems, each containing part of the data, and easily
> recoverable.
>
> On Fri, Jul 16, 2010 at 6:45 AM, Olivier Bruchez
Olivier Bruchez
Jul 23, 2010, 4:24:29 PM7/23/10
to drobo-talk
Ok, cool, keep us posted!
Any tip on installing/configuring mhddfs?
Olivier
Any tip on installing/configuring mhddfs?
Olivier
Julian Urquijo
Jul 25, 2010, 11:08:10 AM7/25/10
to drobo-talk
Here's the pertinent part of my fstab
# drobo 1st 2TB LUN
UUID=4c48fc16-e662-47ac-a8c0-a230a3d68f26 /media/drobo1 ext3
noatime 0 0
# drobo 2nd 2TB LUN
UUID=ae080781-40ab-403a-bf1c-023085713047 /media/drobo2 ext3
noatime 0 0
#union fs mount
mhddfs#/media/drobo1,/media/drobo2 /media/drobo fuse
nonempty,mlimit=1G,allow_other 0 0
It's working perfectly. I would enable logging while setting it up and
testing, then disable before copying large amounts of data to the
mount - mhddfs puts 3-4 entries into the log for each file it touches,
so the log grows VERY quickly.
I use the "nonempty" mount option to allow it to mount even if a file
exists in the mountpoint because I have a crontab that touches a file
on /media/drobo every 5 minutes to keep it from spinning down.
The lights on the drobo are accurate - I've seen them go up to 4 lit,
deleted some data, back down to 3 lit, then added new data, back up to
4 lit.
samba's working just fine with mhddfs. I have not created the iscsi
target yet.
# drobo 1st 2TB LUN
UUID=4c48fc16-e662-47ac-a8c0-a230a3d68f26 /media/drobo1 ext3
noatime 0 0
# drobo 2nd 2TB LUN
UUID=ae080781-40ab-403a-bf1c-023085713047 /media/drobo2 ext3
noatime 0 0
#union fs mount
mhddfs#/media/drobo1,/media/drobo2 /media/drobo fuse
nonempty,mlimit=1G,allow_other 0 0
It's working perfectly. I would enable logging while setting it up and
testing, then disable before copying large amounts of data to the
mount - mhddfs puts 3-4 entries into the log for each file it touches,
so the log grows VERY quickly.
I use the "nonempty" mount option to allow it to mount even if a file
exists in the mountpoint because I have a crontab that touches a file
on /media/drobo every 5 minutes to keep it from spinning down.
The lights on the drobo are accurate - I've seen them go up to 4 lit,
deleted some data, back down to 3 lit, then added new data, back up to
4 lit.
samba's working just fine with mhddfs. I have not created the iscsi
target yet.
Peter Silva
Jul 25, 2010, 9:19:55 PM7/25/10
to drobo...@googlegroups.com
Olivier Bruchez
Jul 26, 2010, 4:57:17 AM7/26/10
to drobo-talk
Good news!
I will try a similar setup this week (i.e. Drobo v2 + two 2-TB ext3
LUNs + mhddfs + samba shares).
It should be ideal (if mhddfs doesn't corrupt my data...).
Olivier
I will try a similar setup this week (i.e. Drobo v2 + two 2-TB ext3
LUNs + mhddfs + samba shares).
It should be ideal (if mhddfs doesn't corrupt my data...).
Olivier
Hylton Conacher (ZR1HPC)
Aug 6, 2010, 11:13:30 AM8/6/10
to drobo...@googlegroups.com
> <mailto:olivier.bruc...@gmail.com>> wrote:
> > Ok, cool, keep us posted!
> >
> > Any tip on installing/configuring mhddfs?
> >
> > Olivier
> >
> > On Jul 20, 5:02 pm, Julian Urquijo <jurqu...@gmail.com
> > Ok, cool, keep us posted!
> >
> > Any tip on installing/configuring mhddfs?
> >
> > Olivier
> >
> > On Jul 20, 5:02 pm, Julian Urquijo <jurqu...@gmail.com
> <mailto:jurqu...@gmail.com>> wrote:
> >
> > > I'm in the process of switching from an old powerbook g4 server w/
> > > drobo v2 , HFS+ 16TB lun to an atom330 running linux w/ drobo ext3
> > > formatted, 2TB luns.
> >
> > > So far so good, the drobo is formatted ext3. Linux reports correct
> > > free space, etc. Drobom status is good.
> >
> > > I'm using mhddfs to combine all drobo luns into one big pool of free
> > > space.
> >
> > > Have copied approx 1.8TBs of data back onto drobo w/ no problems.
> >
> > > Will post back here once I cross the 2TB threshold onto the 2nd lun
> > > and also with my experiences setting up an iscsi target on the drobo
> > > for win7.
> >
> > > On Jul 16, 6:39 am, Peter Silva <Peter.A.Si...@gmail.com
> >
> > > I'm in the process of switching from an old powerbook g4 server w/
> > > drobo v2 , HFS+ 16TB lun to an atom330 running linux w/ drobo ext3
> > > formatted, 2TB luns.
> >
> > > So far so good, the drobo is formatted ext3. Linux reports correct
> > > free space, etc. Drobom status is good.
> >
> > > I'm using mhddfs to combine all drobo luns into one big pool of free
> > > space.
> >
> > > Have copied approx 1.8TBs of data back onto drobo w/ no problems.
> >
> > > Will post back here once I cross the 2TB threshold onto the 2nd lun
> > > and also with my experiences setting up an iscsi target on the drobo
> > > for win7.
> >
> > > On Jul 16, 6:39 am, Peter Silva <Peter.A.Si...@gmail.com
> <mailto:Peter.A.Si...@gmail.com>> wrote:
> >
> > > > mhddfs is just a layer that makes several underlying file
> systems look like
> > > > a single one. the underlying file systems can be ext3, hfs+,
> or ntfs, or
> > > > all three mixed together. if mhddfs is not available, you
> just have the
> > > > separate file systems, each containing part of the data, and
> easily
> > > > recoverable.
> >
> > > > On Fri, Jul 16, 2010 at 6:45 AM, Olivier Bruchez
> > > > <olivier.bruc...@gmail.com
> <mailto:olivier.bruc...@gmail.com>>wrote:> >
> > > > mhddfs is just a layer that makes several underlying file
> systems look like
> > > > a single one. the underlying file systems can be ext3, hfs+,
> or ntfs, or
> > > > all three mixed together. if mhddfs is not available, you
> just have the
> > > > separate file systems, each containing part of the data, and
> easily
> > > > recoverable.
> >
> > > > On Fri, Jul 16, 2010 at 6:45 AM, Olivier Bruchez
> > > > <olivier.bruc...@gmail.com
> >
> > > > > mhddfs looks interesting... But I'm not sure I would feel
> "secure"
> > > > > using it. After all, more people are using ntfs-3g than
> mhddfs, right?
> >
> > > > > Olivier
> >
> > > > > On Jul 14, 12:21 pm, Peter Silva <Peter.A.Si...@gmail.com
> >
> > > > > > > I have a second-generation Drobo with three 2-TB
> harddrives, for a
> > > > > > > total of 3.6 TB available for data, a MacBook Pro with
> Mac OS X and
> > > > > > > Windows XP SP3 (and soon Windows 7), as well as another
> machine with
> > > > > > > the latest version of Ubuntu.
> >
> > > > > > > I have been using my Drobo for months with Mac OS X,
> with a single 16-
> > > > > > > TB LUN (HFS+, non-journaled). Now I'd like to use it on
> my Ubuntu
> > > > > > > machine, but Ubuntu doesn't support HFS+ with volumes >
> 2 TB (larger
> > > > > > > volumes were getting corrupted, apparently).
> >
> > > > > > > What are my best options? Is there any way to format a
> 8-TB or 16-TB
> > > > > > > ext3 volume? Is it too risky? If performance is not an
> issue, what
> > > > > > > about a 16-TB NTFS volume (formatted from Windows 7)?
> Any other
> > > > > > > option?
> >
> > > > > > > Thanks for your help,
> > > > > > > Olivier
Maybe the end of the 2TB partition size for Drobo on Linux is in site Peter?
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