Alain Spineux wrote: > On Nov 29, 2007 4:21 PM, Ugo Bellavance <ugob at lubik.ca> wrote: >> Alain Spineux wrote: >>> On Nov 29, 2007 6:59 AM, Ugo Bellavance <ugob at lubik.ca> wrote: >>>> Hi, >>>> >>>> This is my current config: >>>> >>>> /dev/md0 -> 200 MB -> sda1 + sdd1 -> /boot >>>> /dev/md1 -> 36 GB -> sda2 + sdd2 -> form VolGroup00 with md2 >>>> /dev/md2 -> 18 GB -> sdb1 + sde1 -> form VolGroup00 with md1 >>>> >>>> sda,sdd -> 36 GB 10k SCSI HDDs >>>> sdb,sde -> 18 GB 10k SCSI HDDs >>>> >>>> I have added 2 36 GB 10K SCSI drives in it, they are detected as sdc and >>>> sdf. >>>> >>>> What should I do if I want to optimize disk space? >>>> >>>> The simplest solution would be to create /dev/md3 out of sdc1 and sdf1, >>>> and add it to the VG, and increase the size of my /vz logical volume. >>>> >>>> However, if I could convert that to a RAID5 (it could be possible to >>>> re-install, but I would rather not), I could have 6 drives in RAID5, so >>>> I'd have 5x36 GB (180) of space available total, instead of 3*36 (108). >>> 180, you mean 2 X 5x18 >> Oh, I just realized I have 2X18 and 4X36. I have 2 other 36 GB HDD >> here. Maybe I could have a 6x36 RAID5 this way. Does it matter if I > > drop the 2x18, to drop the 2x18 complexity, > or keep them in mirroring, and maybe on another VG, > to backup/store more critical data Ok, but the server can only have 6 HDD. So, first step, how would I replace the current 2X18 by the 2x36 that I put in the server yesterday? (BTW thanks a lot for your help, it is very interesting) Regards, Ugo