[mythtv-users] SATA and IDE ATA100 in the Same LVM grouping?

[Tim McClarren]

Yes, and no.

The only thing to be aware of is that SATA drives appear under "s" 
devices, PATA appear under "h".

Here's my "cat /proc/mdstat" and my "/usr/sbin/pvdisplay" output:

[me at slap bin]# cat /proc/mdstat
Personalities : [raid0] [raid1] [raid5]
md1 : active raid5 sdd2[5] sdc2[4] sdb2[3] sda2[2] hdc2[1] hda2[0]
       243865600 blocks level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]

md2 : active raid5 sdd3[5] sdc3[4] sdb3[3] sda3[2] hdc3[1] hda3[0]
       243865600 blocks level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]

md3 : active raid5 sdd5[5] sdc5[4] sdb5[3] sda5[2] hdc5[1] hda5[0]
       243865600 blocks level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]

md4 : active raid5 sdd6[5] sdc6[4] sdb6[3] sda6[2] hdc6[1] hda6[0]
       243865600 blocks level 5, 256k chunk, algorithm 2 [6/6] [UUUUUU]

md5 : active raid0 sdd7[1] sdc7[0]
       97546240 blocks 256k chunks

md0 : active raid1 sdb1[3] sda1[2] hdc1[1] hda1[0]
       264960 blocks [4/4] [UUUU]

unused devices: <none>

[me at slap bin]# /usr/sbin/pvdisplay
   --- Physical volume ---
   PV Name               /dev/md2
   VG Name               vg1
   PV Size               232.56 GB / not usable 0
   Allocatable           yes (but full)
   PE Size (KByte)       65536
   Total PE              3721
   Free PE               0
   Allocated PE          3721
   PV UUID               6aabb4-85Hc-INeF-Z4ah-NBml-C6wN-jvKr5q

   --- Physical volume ---
   PV Name               /dev/md3
   VG Name               vg1
   PV Size               232.56 GB / not usable 0
   Allocatable           yes (but full)
   PE Size (KByte)       65536
   Total PE              3721
   Free PE               0
   Allocated PE          3721
   PV UUID               brxgUb-rEPQ-ZRS1-ebEu-A6wO-JARf-y97YHx

   --- Physical volume ---
   PV Name               /dev/md4
   VG Name               vg1
   PV Size               232.56 GB / not usable 0
   Allocatable           yes
   PE Size (KByte)       65536
   Total PE              3721
   Free PE               3
   Allocated PE          3718
   PV UUID               LfH9zj-2JJ0-DFbX-YJnv-LPD9-UTNs-i0fTEH

   --- Physical volume ---
   PV Name               /dev/md1
   VG Name               vg0
   PV Size               232.56 GB / not usable 0
   Allocatable           yes
   PE Size (KByte)       65536
   Total PE              3721
   Free PE               216
   Allocated PE          3505
   PV UUID               r7LP9N-Ol4t-9IqL-swWv-4Hg6-7JjJ-XtjZos




As you can see, I have a mixture of PATA and SATA devices, each 
partitioned, partitions belonging to RAID 5 volumes, which are then LVMed.

Yes, seems overly complicated.

Ian Towler wrote:
> I have searched the forums for a while now, and have
> not come up with a solid answer.  
> 
> Can you use LVM to group a SATA drive with an IDE
> ATA100 drive?  if you can, is it just the standard
> commands or are there any pitfalls to be aware of?
> 
> Thanks ahead of time.
> 
> Ian
> 
> 
> 
> 
> 
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