2013/4/22 NeilBrown <neilb@xxxxxxx>:
> I'll try to make sure that works correctly for the next release.
> Thanks for the report.
Sorry, Neil. for bumping up old thread. I'm again have problems with
data-offset param for mdadm.
I'm using version from git master (guthub). If i try to create raid1 like
/sbin/mdadm --create --data-offset=2048 --metadata=1.2 --verbose
--force --run --bitmap=internal --assume-clean --name=md21_901
md21_901 --level=raid1 --raid-devices=2 /dev/mapper/sas00-21_901
/dev/mapper/sas01-21_901
I have
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : 64e0028e:301aa3ce:cdf1a54f:a9e28f27
Name : xen25:md21_901 (local to host xen25)
Creation Time : Fri Dec 27 10:43:06 2013
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 10489856 (5.00 GiB 5.37 GB)
Array Size : 5244928 (5.00 GiB 5.37 GB)
Data Offset : 4096 sectors
Super Offset : 8 sectors
Unused Space : before=4008 sectors, after=0 sectors
State : clean
Device UUID : 38771de6:cb5f0dbc:9f32f85f:164e1e89
Internal Bitmap : 8 sectors from superblock
Update Time : Fri Dec 27 10:43:22 2013
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 7f07eb77 - correct
Events : 2
But when i try to create raid1 like
/sbin/mdadm --create --data-offset=1024 --metadata=1.2 --verbose
--force --run --bitmap=internal --assume-clean --name=md21_901
md21_901 --level=raid1 --raid-devices=2 /dev/mapper/sas00-21_901
/dev/mapper/sas01-21_901
I getting
Magic : a92b4efc
Version : 1.2
Feature Map : 0x1
Array UUID : ef22dca1:1424ea9e:1b4dce89:27c61a91
Name : xen25:md21_901 (local to host xen25)
Creation Time : Fri Dec 27 10:44:21 2013
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 10491904 (5.00 GiB 5.37 GB)
Array Size : 5245952 (5.00 GiB 5.37 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1960 sectors, after=0 sectors
State : clean
Device UUID : afae5e27:6c706246:4c3e3cb0:e5c726ac
Internal Bitmap : 8 sectors from superblock
Update Time : Fri Dec 27 10:44:26 2013
Bad Block Log : 512 entries available at offset 72 sectors
Checksum : 45be4cd1 - correct
Events : 2
Why data offset specified in command line grows twice in resulting md
array component?
--
Vasiliy Tolstov,
e-mail: v.tolstov@xxxxxxxxx
jabber: vase@xxxxxxxxx
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