Dell Precision 470, Migrating with non-RAID SCSI to Perc4e/DC.. (Help needed) (fwd)

[vincent at cojot.name]

For the record, I figured the following: keeping the data on the existing 
disk while migratng to a PERC4e/DC is not possible. There are two reasons:

1) Striping is mandatory in the RAID-1 config (you cannot just disable 
striping in the PERC RAID menus..:( ).

2) The disk geometry is different (hence the Buffer I/O errors I guess..):

In the following output, /dev/sda is a Fujitsu MAT3147N disk on an aacraid 
HBA without RAID and /dev/sdb is a MegaRaid RAID-1 device built with two 
identical disk drives (MAT3147N).

As you can see, the size differs (the RAID-1 device is smaller than the 
native device..)

[root at palanthas ~]# fdisk -l /dev/sda|grep Disk
Disk /dev/sda: 146.8 GB, 146810536448 bytes

[root at palanthas ~]# fdisk -l /dev/sdb|grep Disk
Disk /dev/sdb: 146.6 GB, 146695782400 bytes

Therefore, my only solution (I guess) is to 'pvmove' all my lv's from 
/dev/sda to /dev/sdb and re-install GRUB (anyone got a procedure for 
migrating a boot disk with LVM?)

Thanks for reading,

  -- 
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Vincent S. Cojot, Computer Engineering. STEP project. _.,-*~'`^`'~*-,._.,-*~
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