Hi All,
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg.
I want to format it ext3 (as they dont support ext4) but when I try I get:
# fdisk -u /dev/sdg
WARNING: GPT (GUID Partition Table) detected on '/dev/sdg'! The util fdisk doesn't support GPT. Use GNU Parted.
WARNING: The size of this disk is 17.6 TB (17592186044416 bytes). DOS partition table format can not be used on drives for volumes larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID partition table format (GPT).
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c').
So I run: # parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
and looking at an example of creating a partition: (parted) mkpart primary 106 16179
I dont know what to do next since I dont see any partitions listed. I dont know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition.
Can anyone provide some advice on that I am missing conceptually?
Jason
On Wed, Apr 10, 2013 at 11:54 AM, Jason T. Slack-Moehrle slackmoehrle@gmail.com wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg.
# parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
and looking at an example of creating a partition: (parted) mkpart primary 106 16179
I dont know what to do next since I dont see any partitions listed. I dont know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition.
Can anyone provide some advice on that I am missing conceptually?
If you have a GUI desktop installed you can install the gparted package from EPEL. It is easier to use than raw parted and mkfs.
-- Les Mikesell lesmikesell@gmail.com
I dont have a graphical desktop installed.
On Wed, Apr 10, 2013 at 11:09 AM, Les Mikesell lesmikesell@gmail.comwrote:
On Wed, Apr 10, 2013 at 11:54 AM, Jason T. Slack-Moehrle slackmoehrle@gmail.com wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as
/dev/sdg.
# parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
and looking at an example of creating a partition: (parted) mkpart
primary
106 16179
I dont know what to do next since I dont see any partitions listed. I
dont
know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know
it
says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition.
Can anyone provide some advice on that I am missing conceptually?
If you have a GUI desktop installed you can install the gparted package from EPEL. It is easier to use than raw parted and mkfs.
-- Les Mikesell lesmikesell@gmail.com _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Wed, Apr 10, 2013 at 1:20 PM, Jason T. Slack-Moehrle slackmoehrle@gmail.com wrote:
I dont have a graphical desktop installed.
So far, when I've been in that situation I've installed X, the gnome desktop, and the freenx package and connected from an NX client. Seemed easier then dealing with the parted options....
-- Les Mikesell lesmikesell@gmail.com
On Wed, Apr 10, 2013 at 11:20:54AM -0700, Jason T. Slack-Moehrle wrote:
I dont have a graphical desktop installed.
One other option is to boot from a gparted-live CD, which gives you a GUI long enough to partition your volume, then reboot your normal system.
Fred
On Wed, Apr 10, 2013 at 11:09 AM, Les Mikesell lesmikesell@gmail.comwrote:
On Wed, Apr 10, 2013 at 11:54 AM, Jason T. Slack-Moehrle slackmoehrle@gmail.com wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as
/dev/sdg.
# parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
and looking at an example of creating a partition: (parted) mkpart
primary
106 16179
I dont know what to do next since I dont see any partitions listed. I
dont
know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know
it
says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition.
Can anyone provide some advice on that I am missing conceptually?
If you have a GUI desktop installed you can install the gparted package from EPEL. It is easier to use than raw parted and mkfs.
-- Les Mikesell lesmikesell@gmail.com _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Jason T. Slack-Moehrle wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg.
I want to format it ext3 (as they dont support ext4) but when I try I get:
<snip>
So I run: # parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
and looking at an example of creating a partition: (parted) mkpart primary 106 16179
I dont know what to do next since I dont see any partitions listed. I dont know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition.
Can anyone provide some advice on that I am missing conceptually?
Several issues. First, if you use 4k blocks, the max filesystem size for ext3 is 16TB (see wikipedia on ext3). Second, I can't remember where, but on some filesystem tool's manpage, I read that the tools have problems going over 16TB. Third, fsck on a 16TB filesystem will take *days*, literally. I'm setting up, right now, a humongous RAID box, and I'll probably be divvying up the 42TB (mirrored!) as 3 14TB filesystems, and they're going to be ext4.
mark
Hi Mark,
Can anyone provide some advice on that I am missing conceptually?
Several issues. First, if you use 4k blocks, the max filesystem size for ext3 is 16TB (see wikipedia on ext3). Second, I can't remember where, but on some filesystem tool's manpage, I read that the tools have problems going over 16TB. Third, fsck on a 16TB filesystem will take *days*, literally. I'm setting up, right now, a humongous RAID box, and I'll probably be divvying up the 42TB (mirrored!) as 3 14TB filesystems, and they're going to be ext4.
16tb is the max I would have for this device.
Jason
I found an article that led me to do:
(parted) mkpart primary 0GB 16TB (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags 1 1049kB 16.0TB 16.0TB primary
On Wed, Apr 10, 2013 at 11:50 AM, Jason T. Slack-Moehrle < slackmoehrle@gmail.com> wrote:
Hi Mark,
Can anyone provide some advice on that I am missing conceptually?
Several issues. First, if you use 4k blocks, the max filesystem size for ext3 is 16TB (see wikipedia on ext3). Second, I can't remember where, but on some filesystem tool's manpage, I read that the tools have problems going over 16TB. Third, fsck on a 16TB filesystem will take *days*, literally. I'm setting up, right now, a humongous RAID box, and I'll probably be divvying up the 42TB (mirrored!) as 3 14TB filesystems, and they're going to be ext4.
16tb is the max I would have for this device.
Jason
Hi Mark,
Do you override the automatic fsck check with tune2fs? It would be a huge bummer to do through a check frequently, I forget the defaults but I think 180 days or a certain number of mounts, iirc.
Jason
On Wed, Apr 10, 2013 at 11:39 AM, m.roth@5-cent.us wrote:
Jason T. Slack-Moehrle wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg.
I want to format it ext3 (as they dont support ext4) but when I try I
get:
<snip> > So I run: > # parted > GNU Parted 2.1 > Using /dev/sda > Welcome to GNU Parted! Type 'help' to view a list of commands. > (parted) select /dev/sdg > Using /dev/sdg > (parted) print > Model: DROBO DroboPro (scsi) > Disk /dev/sdg: 17.6TB > Sector size (logical/physical): 512B/512B > Partition Table: gpt > > Number Start End Size File system Name Flags > > (parted) > > and looking at an example of creating a partition: (parted) mkpart primary > 106 16179 > > I dont know what to do next since I dont see any partitions listed. I dont > know what do to for the start and end point, although the man page says > "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it > says 17.6 TB but this model drobo can only support partitions up to 16tb > without making a second partition. > > Can anyone provide some advice on that I am missing conceptually?
Several issues. First, if you use 4k blocks, the max filesystem size for ext3 is 16TB (see wikipedia on ext3). Second, I can't remember where, but on some filesystem tool's manpage, I read that the tools have problems going over 16TB. Third, fsck on a 16TB filesystem will take *days*, literally. I'm setting up, right now, a humongous RAID box, and I'll probably be divvying up the 42TB (mirrored!) as 3 14TB filesystems, and they're going to be ext4.
mark
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Jason T. Slack-Moehrle wrote:
Hi Mark,
Do you override the automatic fsck check with tune2fs? It would be a huge bummer to do through a check frequently, I forget the defaults but I think 180 days or a certain number of mounts, iirc.
We do it manually, when we get to it, and when the users are going to be off long enough....
Btw, I saw that you said you'd started on 1M - good move. I always start parted with -a optimal. I've read that non-optimal alignment can result in serious slowdowns in throughput - half as fast, or even slower.
mark
Jason
On Wed, Apr 10, 2013 at 11:39 AM, m.roth@5-cent.us wrote:
Jason T. Slack-Moehrle wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg.
I want to format it ext3 (as they dont support ext4) but when I try I
get:
<snip> > So I run: > # parted > GNU Parted 2.1 > Using /dev/sda > Welcome to GNU Parted! Type 'help' to view a list of commands. > (parted) select /dev/sdg > Using /dev/sdg > (parted) print > Model: DROBO DroboPro (scsi) > Disk /dev/sdg: 17.6TB > Sector size (logical/physical): 512B/512B > Partition Table: gpt > > Number Start End Size File system Name Flags > > (parted) > > and looking at an example of creating a partition: (parted) mkpart primary > 106 16179 > > I dont know what to do next since I dont see any partitions listed. I dont > know what do to for the start and end point, although the man page says > "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it > says 17.6 TB but this model drobo can only support partitions up to 16tb > without making a second partition. > > Can anyone provide some advice on that I am missing conceptually?
Several issues. First, if you use 4k blocks, the max filesystem size for ext3 is 16TB (see wikipedia on ext3). Second, I can't remember where, but on some filesystem tool's manpage, I read that the tools have problems going over 16TB. Third, fsck on a 16TB filesystem will take *days*, literally. I'm setting up, right now, a humongous RAID box, and I'll probably be divvying up the 42TB (mirrored!) as 3 14TB filesystems, and they're going to be ext4.
mark
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Thanks for the advice.
What are you storing on your large RAIDS that you mention?
On Wed, Apr 10, 2013 at 12:35 PM, m.roth@5-cent.us wrote:
Jason T. Slack-Moehrle wrote:
Hi Mark,
Do you override the automatic fsck check with tune2fs? It would be a huge bummer to do through a check frequently, I forget the defaults but I
think
180 days or a certain number of mounts, iirc.
We do it manually, when we get to it, and when the users are going to be off long enough....
Btw, I saw that you said you'd started on 1M - good move. I always start parted with -a optimal. I've read that non-optimal alignment can result in serious slowdowns in throughput - half as fast, or even slower.
markJason
On Wed, Apr 10, 2013 at 11:39 AM, m.roth@5-cent.us wrote:
Jason T. Slack-Moehrle wrote:
I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg.
I want to format it ext3 (as they dont support ext4) but when I try I
get:
<snip> > So I run: > # parted > GNU Parted 2.1 > Using /dev/sda > Welcome to GNU Parted! Type 'help' to view a list of commands. > (parted) select /dev/sdg > Using /dev/sdg > (parted) print > Model: DROBO DroboPro (scsi) > Disk /dev/sdg: 17.6TB > Sector size (logical/physical): 512B/512B > Partition Table: gpt > > Number Start End Size File system Name Flags > > (parted) > > and looking at an example of creating a partition: (parted) mkpart primary > 106 16179 > > I dont know what to do next since I dont see any partitions listed. I dont > know what do to for the start and end point, although the man page says > "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it > says 17.6 TB but this model drobo can only support partitions up to 16tb > without making a second partition. > > Can anyone provide some advice on that I am missing conceptually?
Several issues. First, if you use 4k blocks, the max filesystem size for ext3 is 16TB (see wikipedia on ext3). Second, I can't remember where, but on some filesystem tool's manpage, I read that the tools have problems going over 16TB. Third, fsck on a 16TB filesystem will take *days*, literally. I'm setting up, right now, a humongous RAID box, and I'll probably be divvying up the 42TB (mirrored!) as 3 14TB filesystems, and they're going to be ext4.
mark
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 4/10/2013 9:54 AM, Jason T. Slack-Moehrle wrote:
# parted GNU Parted 2.1
here's my parted recipe for making very large volumes... this will fill the disk, reserving 512K up front to be on a reasonable stripe boundary
|parted /dev/sdb ||"mklabel gpt"| |parted -a none /dev/sdb ||"mkpart primary 1024s -1s"|
I would under NO conditions make a EXT3 volume anywheres NEAR as big as you're talking about. my preference for large volumes is XFS.
VG=vg_$(hostname -s)_data vgcreate $VG /dev/sdb1 lvcreate --size 8T --name lv_data $VG mkfs.xfs /dev/$VG/lv_data mount /dev/$VG/lv_data /data
if your storage device presents the storage as a block device, then there's no 'support' issues I'm aware of for file systems, its just sectors as far as the storage device is concerned, the file system is strictly up to your OS.
Hi John,
Thanks for this info. Drobo says no ext4: http://support.drobo.com/app/answers/detail/a_id/165/~/how-do-i-use-my-drobo...
I will look up XFS.
Jason
On Wed, Apr 10, 2013 at 1:50 PM, John R Pierce pierce@hogranch.com wrote:
On 4/10/2013 9:54 AM, Jason T. Slack-Moehrle wrote:
# parted GNU Parted 2.1
here's my parted recipe for making very large volumes... this will fill the disk, reserving 512K up front to be on a reasonable stripe boundary
|parted /dev/sdb ||"mklabel gpt"| |parted -a none /dev/sdb ||"mkpart primary 1024s -1s"|
I would under NO conditions make a EXT3 volume anywheres NEAR as big as you're talking about. my preference for large volumes is XFS.
VG=vg_$(hostname -s)_data vgcreate $VG /dev/sdb1 lvcreate --size 8T --name lv_data $VG mkfs.xfs /dev/$VG/lv_data mount /dev/$VG/lv_data /dataif your storage device presents the storage as a block device, then there's no 'support' issues I'm aware of for file systems, its just sectors as far as the storage device is concerned, the file system is strictly up to your OS.
-- john r pierce 37N 122W somewhere on the middle of the left coast
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Wed, Apr 10, 2013 at 4:11 PM, Jason T. Slack-Moehrle slackmoehrle@gmail.com wrote:
Hi John,
Thanks for this info. Drobo says no ext4: http://support.drobo.com/app/answers/detail/a_id/165/~/how-do-i-use-my-drobo...
That's interesting but it makes me wonder what they are doing wrong. A block device should just deal with data blocks and not know/care about what filesystem is implemented on top of the blocks.
-- Les Mikesell lesmikesell@gmail.com
On Wed, Apr 10, 2013 at 3:50 PM, John R Pierce pierce@hogranch.com wrote:
I would under NO conditions make a EXT3 volume anywheres NEAR as big as you're talking about. my preference for large volumes is XFS.
Is there some rule of thumb for how much RAM the system should have for that?
-- Les Mikesell lesmikesell@gmail.com
On 4/10/2013 2:12 PM, Les Mikesell wrote:
On Wed, Apr 10, 2013 at 3:50 PM, John R Piercepierce@hogranch.com wrote:
I would under NO conditions make a EXT3 volume anywheres NEAR as big as you're talking about. my preference for large volumes is XFS.
Is there some rule of thumb for how much RAM the system should have for that?
I've been putting 24-48GB in my servers with large multiterabyte XFS volumes. so far, I haven't had any issues. Some of these systems have 74TiB file systems (81 TB), primarily used as long term retention archival nearline storage.
From: Jason T. Slack-Moehrle slackmoehrle@gmail.com
So I run: # parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt
Number Start End Size File system Name Flags
(parted)
and looking at an example of creating a partition: (parted) mkpart primary 106 16179
I dont know what to do next since I dont see any partitions listed. I dont know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition.
Can anyone provide some advice on that I am missing conceptually?
When I had to play with GPT for a 3TB disk, I did: gdisk -l /dev/sdc parted -s /dev/sdc mklabel gpt parted -s -a optimal /dev/sdc unit s mkpart primary ext4 2048 <MAXVALUE>
Not sure if optimal, but it worked...
JD
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