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-1
votes
0answers
10 views

How do I find the physical LBA that maps to a relative LBA within an LVM volume?

I have a file in an ext3 filesystem in an LVM volume that's in an mdraid container (raid1, 2 physical disks). I can find the LBAs of the file, relative to the start of the LVM volume, using hdparm ...
0
votes
0answers
31 views

LVM fault tolerance and recovery over 2 mdraid RAID5 arrays PVs

I have an Ubuntu 14.04 LTS server with an mdraid RAID5 array and LVM on top, meaning one PV and one VG using it. The LVM is configured to allocate all the space to one LV. The LV is formatted with an ...
3
votes
1answer
79 views

Expanding ZFS on MDRaid?

I had a 4-disk mdraid of 8.12TB with zfsonlinux's ZFS: # zpool status pool: tank state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM tank ...
1
vote
1answer
146 views

Why does md resync cause no iowait?

I've known the defintion of %iowait as Time the CPU spent idling/blocking, because it had to wait on an IO operation to complete. Now take a simple Linux system with an mdraid1 and two disks. ...
0
votes
2answers
378 views

Headless server with an mdraid array won't boot

I'm in a bit of a pickle. I have a headless server (Acer EasyStore) running Ubuntu 12.04.1, which, after an update, now refuses to boot. It has four disks, one of which holds the OS in a partition and ...
3
votes
3answers
2k views

RAID6 mdraid -> LVM -> EXT4 root with GRUB2?

2012-03-31 Debian Wheezy daily build in VirtualBox 4.1.2, 6 disk devices. My steps to reproduce so far: Setup one partition, using the entire disk, as a physical volume for RAID, per disk Setup a ...
1
vote
1answer
201 views

moving mdraid from failed Buffalo NAS

I've been tasked with restoring a RAID from a failed Buffalo NAS. the NAS box has failed, but our understanding at this point is that the drives are still functioning. I believe that Buffalo's NAS was ...