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Old 05-23-2012, 06:23 PM
Alan McKay
 
Default biggest disk partition on 5.8?

Hey folks,

I have a Sun J4400 SAS1 disk array with 24 x 1T drives in it connected
to a Sunfire x2250 running 5.8 ( 64 bit )

I used 'arcconf' to create a big RAID60 out of (see below).

But then I mount it and it is way too small
This should be about 20TB :

[root@solexa1 StorMan]# df -h /dev/sdb1
Filesystem Size Used Avail Use% Mounted on
/dev/sdb1 186G 60M 176G 1% /mnt/J4400-1


Here is how I created it :

./arcconf create 1 logicaldrive name J4400-1-RAID60 max 60 0 0 0 1 0 2
0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 15 0 16 0 17 0
18 0 19 0 20 0 21 0 22 0 23 noprompt

[root@solexa1 StorMan]# ./arcconf getconfig 1 ld
Controllers found: 1
----------------------------------------------------------------------
Logical device information
----------------------------------------------------------------------
Logical device number 0
Logical device name : J4400-1-RAID60
RAID level : 60 XOR
Status of logical device : Impacted
Size : 19066880 MB
Stripe-unit size : 256 KB
Read-cache mode : Enabled
Write-cache mode : Enabled (write-back)
Write-cache setting : Enabled (write-back)
when protected by battery
Partitioned : Yes
Protected by Hot-Spare : No
Bootable : Yes
Failed stripes : No
--------------------------------------------------------
Logical device segment information
--------------------------------------------------------
Group 0, Segment 0 : Present (0,0) 9QJ3ZAYQ
Group 0, Segment 1 : Present (0,1) 9QJ3ZP3Y
Group 0, Segment 2 : Present (0,2) 9QJ3X7GR
Group 0, Segment 3 : Present (0,3) 9QJ3XJQW
Group 0, Segment 4 : Present (0,4) 9QJ3TPK2
Group 0, Segment 5 : Present (0,5) 9QJ40PHP
Group 0, Segment 6 : Present (0,6) GTE002PBHJEDBE
Group 0, Segment 7 : Present (0,7) 9QJ3ZHE0
Group 0, Segment 8 : Present (0,8) 9QJ3Z053
Group 0, Segment 9 : Present (0,9) 9QJ3ZEX6
Group 0, Segment 10 : Present (0,10) 9QJ33XGG
Group 0, Segment 11 : Present (0,11) 9QJ3X88X
Group 1, Segment 0 : Present (0,12) 9QJ3YLR2
Group 1, Segment 1 : Present (0,13) GTE002PBHHNVZE
Group 1, Segment 2 : Present (0,14) 9QJ3ZGM2
Group 1, Segment 3 : Present (0,15) GTE002PBGP9VZE
Group 1, Segment 4 : Present (0,16) 9QJ3ZB4X
Group 1, Segment 5 : Present (0,17) 9QJ3ZAE0
Group 1, Segment 6 : Present (0,18) 9QJ3Y8C8
Group 1, Segment 7 : Present (0,19) GTE002PBH30GKE
Group 1, Segment 8 : Present (0,20) GTE002PAKXKDPE
Group 1, Segment 9 : Present (0,21) 9QJ3VXEL
Group 1, Segment 10 : Present (0,22) 9QJ3W4W6
Group 1, Segment 11 : Present (0,23) 9QJ3TPGR


Make 1 big partition :

sfdisk /dev/sdb <<EOF
,,L
EOF

[root@solexa1 StorMan]# sfdisk -l /dev/sdb

Disk /dev/sdb: 2430685 cylinders, 255 heads, 63 sectors/track
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sdb1 0+ 24540- 24541- 197124430 83 Linux
/dev/sdb2 0 - 0 0 0 Empty
/dev/sdb3 0 - 0 0 0 Empty
/dev/sdb4 0 - 0 0 0 Empty

And then make an ext4 filesystem on that :

[root@solexa1 StorMan]# mke4fs /dev/sdb1
mke4fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
12320768 inodes, 49281107 blocks
2464055 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
1504 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872

Writing inode tables: done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 30 mounts or
180 days, whichever comes first. Use tune4fs -c or -i to override.

--
“Don't eat anything you've ever seen advertised on TV”
* * * ** - Michael Pollan, author of "In Defense of Food"
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Old 05-23-2012, 06:25 PM
Alan McKay
 
Default biggest disk partition on 5.8?

Damn, should have checked the archives first (had been looking at
Centos and RHEL docs but no luck)

Looks like 16TB is the limit?


--
“Don't eat anything you've ever seen advertised on TV”
* * * ** - Michael Pollan, author of "In Defense of Food"
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Old 05-23-2012, 09:16 PM
Johnny Hughes
 
Default biggest disk partition on 5.8?

On 05/23/2012 01:25 PM, Alan McKay wrote:
> Damn, should have checked the archives first (had been looking at
> Centos and RHEL docs but no luck)
>
> Looks like 16TB is the limit?
>
>
http://wiki.centos.org/About/Product

Indeed 16TB is the ext3 limit.

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Old 05-24-2012, 01:04 PM
Ross Walker
 
Default biggest disk partition on 5.8?

On May 23, 2012, at 2:25 PM, Alan McKay <alan.mckay@gmail.com> wrote:

> Damn, should have checked the archives first (had been looking at
> Centos and RHEL docs but no luck)
>
> Looks like 16TB is the limit?

In ext3, i believe xfs has a limit in the PBs.

-Ross

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Old 05-24-2012, 01:38 PM
John Doe
 
Default biggest disk partition on 5.8?

From: Alan McKay <alan.mckay@gmail.com>

> I have a Sun J4400 SAS1 disk array with 24 x 1T drives in it connected
> But then I mount it and it is way too small
> This should be about 20TB :

You partitions looks weird.
Di you use GPT...?
FAT is limited to 2TB.

JD
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Old 05-25-2012, 02:16 AM
Warren Young
 
Default biggest disk partition on 5.8?

On 5/23/2012 12:23 PM, Alan McKay wrote:
> And then make an ext4 filesystem on that :

ext4 is limited to 16 TB.

Use xfs instead. I explain how here:

http://unix.stackexchange.com/questions/29078/
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Old 05-25-2012, 10:36 AM
Peter Kjellstrm
 
Default biggest disk partition on 5.8?

On Wednesday 23 May 2012 14.23.31 Alan McKay wrote:
> Hey folks,
...
> I used 'arcconf' to create a big RAID60 out of (see below).
>
> But then I mount it and it is way too small
> This should be about 20TB :
...
> /dev/sdb1 186G 60M 176G 1% /mnt/J4400-1
...
> Here is how I created it :
>
> ./arcconf create 1 logicaldrive name J4400-1-RAID60 max 60 0 0 0 1 0 2
...
> Make 1 big partition :
>
> sfdisk /dev/sdb <<EOF
> ,,L
> EOF

This is the problem, various filesystems issues are irrelevant. sfdisk only
uses "the old" msdos type partition table and this does not support >2T
devices. It is unfortunate that it lacks proper error checking and warnings...

You should do one of:

1) don't use partitioning (mkfs directly on /dev/sdb)
2) use LVM (pvcreate /dev/sdb ...)
3) use a GPT type partition table (parted /dev/sdb or similar)

After this you'll have to tackle the current 16T limit for ext4 and other
filesystem related oddities..

/Peter
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Old 05-26-2012, 03:40 AM
Rajagopal Swaminathan
 
Default biggest disk partition on 5.8?

Greetings,


On Wed, May 23, 2012 at 11:53 PM, Alan McKay <alan.mckay@gmail.com> wrote:
> Hey folks,
>
> I have a Sun J4400 SAS1 disk array with 24 x 1T drives in it connected
> to a Sunfire x2250 running 5.8 ( 64 bit )

You can perhaps think about using GFS apart from XFS


--
Regards,

Rajagopal
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