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Bug#515075: marked as forwarded (mdadm: Real array size does not corres

Subject: Bug#515075: marked as forwarded mdadm: Real array size does not correspond to created FS size
From: Debian Bug Tracking System
Date: Fri, 13 Feb 2009 11:48:04 +0000
Your message dated Fri, 13 Feb 2009 12:44:49 +0100
with message-id <[email protected]>
has caused the   report #515075,
regarding mdadm: Real array size does not correspond to created FS size
to be marked as having been forwarded to the upstream software
author(s) [email protected]

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-- 
515075: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=515075
Debian Bug Tracking System
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--- Begin Message ---
Subject: Re: Bug#515075: mdadm: Real array size does not correspond to created FS size
From: martin f krafft
Date: Fri, 13 Feb 2009 12:44:49 +0100
also sprach Arthur Chuvashov <[email protected]> [2009.02.13.1002 +0100]:
> Tried to create RAID6 array: mdadm --create --verbose /dev/md0
> --level=6 --chunk=1024 --raid-devices=6 --spare-devices=0
> /dev/sd[abcdef]1
> 
> The size of array, according to mdadm -E, is good:
> 
> mdadm -E /dev/sda1
[...]
>      Array Size : 3907039232 (3726.04 GiB 4000.81 GB)
[...]

> But /proc/mdstats contains invalid couln of blocks
> 
> cat /proc/mdstat
> Personalities : [raid6] [raid5] [raid4]
> md0 : active (auto-read-only) raid6 sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1] 
> sda1[0]
>       1759555584 blocks level 6, 1024k chunk, algorithm 2 [6/6] [UUUUUU]

That is weird. Neil, any idea?

> If I format a partition (tried XFS and reiserfs), I get 2TB
> partition instead of 4TB. This is true for mdadm 2.6.2, 2.6.7.2.
> Tried with kernel 2.6.27.17 and 2.6.28.4

I suspect XFS and reiserfs just cannot handle >2Tb filesystems? Try
ext3 or ext4?

-- 
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