The scenarios is the following:
2 Drives from a Cobalt RaQ 550.
Cobalt RaQ 550 uses XFS
On 1 drive, I need the fouth partition.
On 2 drive, I need the first partition data.
I have a new box built with Brian's NuOnce 4.5. It has two SATA
drives in software RAID 250 GB.
I boot the system using Knoppix 4.0.
I mount Drive1RaQ550 using a USB enclosure. The partition comes from
/dev/sdc4.
I copy data using the cp command and rsync command from the mounted
partition (/dev/sdc4) to a local partition (/dev/sda7).
I reboot the system into Knoppix 4.0 again but this time I mount
Drive2RaQ550. The partition comes from /dev/sdc1.
I copy data using the cp command and rsync command from the mounted
partition (/dev/sdc1) to a local paritition (/dev/sda7).
I still see all the data from the previous Knoppix session in the /dev/sda7.
I boot the system into CentOS/Bq.
I cannot see the data using an ls-la command.
I can see there is data (79GB) when I do a df -h.
I only see 21 MB when I do a du -sh command.
I booted into Knoppix 4.0 again and do not see the data.
I mount /dev/sda4 and /dev/sdb4. This should be the same partition
(software RAID) from the two internal drives.
I do a df -h and I see sda7 has the full 79 GB while sdb7 has 19 GB.
Theories:
1. The file handles were lost somehow.
2. Software raid may behind the problem. Hence the reason I see
that sdb7 looks like it might be catching up to sda7.
Questions?
How can we monitor any software RAID rebuilding?
Any ideas of saving me the tremendous time of getting to the data
without doing some other method which involves going back to the
original disks (it took me nearly 24 hours to copy the data)?
Any other questions or answers that you might have is
appreciated. This is a box that I need to get back up and running
ASAP. However, I still have the original data on external XFS drives
and I am willing to rebuild the BQ box. However, I need to take the
solution what is the least amount of time.
-Rashid
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