I had the following problem: I wanted to replace Samsung 1TB HD with a new shinny WD RED 2 TB without factory reset.
In my case I only use one HD since I can afford to have my NAS off-line for some time. Obviously I have a full back-up on external usb HD kept off-site.
So these are steps to follow:
1) Insert 2TB HD and wait for replication to complete 2) Remove 1TB HD to have non-redundant configuration with 1TB capacity At this point you might install another 2TB HD to extend capacity to 2TB, but this wasn't option for me, since it meant a purchase of another 2TB HD which I did not need. 3) Login as root (ssh) 4) Run parted (if not installed run apt-get install parted) 5) Run print in parted:
Number Start End Size File system Name Flags 1 32.8kB 4295MB 4295MB raid 2 4295MB 4832MB 537MB raid 3 4832MB 1000GB 995GB raid 4 1000GB 2000GB 1000GB logical
### another 1TB partition no. 4 created
7) quit parted (parted) q Information: You may need to update /etc/fstab.
8 ) run lvm root@Readynas:~# lvm
9) create a physical volume /dev/sda4 (sda4 because it is partition no. 4 on /dev/sda)
lvm> pvcreate /dev/sda4 Physical volume "/dev/sda4" successfully created
10) run pvs to display information about physical volumes lvm> pvs PV VG Fmt Attr PSize PFree /dev/md2 c lvm2 a- 927.00g 7.00g /dev/sda4 lvm2 a- 931.51g 931.51g
#### As you can see the Volume Group (VG) is called "c"
11) now we need to extend the Volume Group (VG) to include the new physical volume /dev/sda4 with vgextend command
lvm> vgextend c /dev/sda4 Volume group "c" successfully extended
12) now you can see extended VG lvm> pvs PV VG Fmt Attr PSize PFree /dev/md2 c lvm2 a- 927.00g 7.00g /dev/sda4 c lvm2 a- 931.50g 931.50g
13) to extend the logical volume to include the new space with lvextend we need to run vgdisplay
lvm> vgdisplay c --- Volume group --- VG Name c System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 6 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 2 Act PV 2 VG Size 1.81 TiB PE Size 64.00 MiB Total PE 29736 Alloc PE / Size 14720 / 920.00 GiB Free PE / Size 15016 / 938.50 GiB VG UUID hz3d0K-fOgY-73tL-THeR-cbgF-itgS-JACE0X
### the number we are looking for is "Free PE / Size" which in our case is 15016 / 938.50 GiB
14) now it is the time for lvextend
lvm> lvextend -l+15016 /dev/c/c Extending logical volume c to 1.81 TiB Logical volume c successfully resized
15) quit lvm
lvm> quit Exiting.
16) and the last step is to expand the file system with resize2fs
root@Readynas:~# resize2fs /dev/c/c resize2fs 1.41.14 (22-Dec-2010) Filesystem at /dev/c/c is mounted on /c; on-line resizing required old desc_blocks = 58, new_desc_blocks = 117 Performing an on-line resize of /dev/c/c to 487194624 (4k) blocks. The filesystem on /dev/c/c is now 487194624 blocks long.
Re: Manually Resizing Readynas Duo 2 X-Raid2 Volume
I was successfull doing this on my ultra 2 running 4.2.25 with some changes: 2) Depending on your braveness it might be wise to shutdown your readynas before pulling out the old drive 5) run "print free" in parted to view the free space and use the start end end numbers with the mkpart command 8 ) lvm doesn't run interactively, but the commads like pvcreate work from the regular commandline 9) If you get " Device /dev/sda4 not found (or ignored by filtering)." then there is a filter in lvm.conf, edit it using your favourite editor root@Readynas:~# pico /etc/lvm/lvm.conf change devices { dir = "/dev" scan = [ "/dev" ] filter = [ "a|^/dev/md[2-9]|", "a|^/dev/md[12][0-9]|", "r/.*/" ] cache = "/etc/lvm/.cache"
