** Description changed:
Binary package hint: parted
- The ubuntu parted that is on the feisty installation cds has a bug when
creating gpt labels (at least on large disk arrays). We tried to create a gpt
label and one XFS partition on a 10,5 TB RAID6-Array.
- Notice: Exactly the same procedure worked on grml 0.9. So it is a bug on the
ubuntu side for sure.
+ The ubuntu parted that is on the feisty (64bit) installation cds has a bug
when creating gpt labels (at least on large disk arrays). We tried to create a
gpt label and one XFS partition on a 10,5 TB RAID6-Array.
+ Notice: Exactly the same procedure worked on grml 0.9 (32 bit distribution).
So it is a bug on the ubuntu side for sure.
Also the grml-version of parted shows the following warning when we print the
partition table (print command):
Warning: /dev/sdc contains GPT signatures, indicating that it has a GPT
table. However, it does not have a valid fake msdos partition table, as it
should. (and so on)
So it seems parted is not able to create correct gpt labels.
+
+ We never saw a similar warning with the ubuntu parted. And this warning
+ is only shown when we create the partition and the label with ubuntu's
+ parted.
Here is the way we can reproduce that error:
parted /dev/sdc mklabel gpt
parted /dev/sdc rm 1
parted /dev/sdc mkpart primary 0 10500G
mkfs.xfs -f /dev/sdc1
mount /dev/sdc1 /mnt/sdc1
df -h [size should be 9.6T]
umount /mnt/sdc1
hdparm -z /dev/sdc[a restart of the system does the same!]
mount /dev/sdc1 /mnt/sdc1
Then you should see the following error on ubuntu. With grml it works
correctly:
I/O error in filesystem ("sdc1") meta-data dev sdc1 block 0x4c65c46ff
("xfs_read_buf") error 5 buf count 2
mount: /dev/sdc1: can't read superblock
Also notice: You'll lose all your data on that partition because of that
error! grml uses the same parted version 1.7.1(but without some ubuntu patches)
--
non working gpt labels
https://bugs.launchpad.net/bugs/107326
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