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Old 29-Nov-2007, 02:25 AM   #1 (permalink)
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Default 4TB Partition Table Lost!

Hi Ladies and Gentlemen,
I Have a mayor Problem with SLES 10 SP1
I Installed SLES 10 on a Dell Poweredge 1800 with Onboard LSI SCSi Controller.
I have attached a Promise V-Trak 300p SAN Subsytem with 4 Terabyte Raid 5.
I Created a 4.3 Terabye Reiserfs Partition with Yast, copied 1.2 Terabyte of Data an Worked for 2 Weeks -everything`s Fine.

Now i Rebooted the Server and it won´t come up because it cant mount the Device, telling me the Superblock is lost an i have to run reiserfsck --rebuild-SB an then reiserfsck --check.

I did that an now i have ca 81 GB Partiotion containing parts of the Data - where is my 4.3 terabyte Partition - it can´t be gone just be rebooting??

I found out that the problem is that a MSDOS Partition Table cannot be bigger than 2 TB - but How did Yast do it? - Maybe it Created a GPT Partition Table and the Reiserfsck converted it somehow int MSDOS.
So how do i get my partition Table Back to acces my Data??


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Old 29-Nov-2007, 02:26 AM   #2 (permalink)
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Default Re: 4TB Partition Table Lost!

I had exactly the same thing happen last week (22nd) after a server crashed.
SLES 10SP1 + Dell PE1950 + Dell MD1000
(2TB+ partition reporting 47GB after crash)

Recreating the partition (as has been suggested) from YAST with the same
start/end will work. However, when the machine crashed again the following
day, the disk again said 47GB. On checking, the partition table was 'msdos' not 'gpt'

I ended up using parted from the command line to make a new 'gpt' partition table
checking at each stage that everything was as expected, and then formatting.
(Luckily server wasn't in production use...yet!)

The server crashed again last night, but the partition seems OK this time.
(I've now got to find out why the server is still crashing!)


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