Thanks again for all the pointers, I will now describe my workflow that
got me going with the new drives!
I'll try and do some ASCII-art [=== used space, --- space (not drives)
used for parity].
1. initial situation
-----------------
~~1TB~~
sda |===========|
sdb |===========|
sdc |=====|
sdd |=====|
sde |=====|
sdf |=====|
sdg |=====|
sdh |=====|
sdi |-----|
sdj |-----|
md1 |=====| - 2 x 1TB RAID0 == 2TB
md2 |=====| - 10 x 1TB RAID6 == 8TB
2. added 4 x 2TB drives
--------------------
sdk | |
sdl | |
sdm | |
sdn |-----------|
md3 | | - 5 x 2TB RAID6 == 6TB (degraded)
3. moved part of md2 data onto md3
----------------------------------
sda | ======|
sdb | ======|
sdc |=====|
sdd |=====|
sde |= |
sdf | |
sdg | |
sdh | |
sdi |-----|
sdj |-----|
sdk |===========|
sdl |===========|
sdm |===========|
sdn |-----------|
md1 |=====| - 2 x 1TB RAID0 == 2TB
md2 |== | - 10 x 1TB RAID6 == 8TB
md3 |===========| - 5 x 2TB RAID6 == 6TB (degraded)
4. shrunk and removed drives from md2
----------------------------------
sda | ======|
sdb | ======|
sdc |=====|
sdd |=====|
sde |= |
sdf |-----|
sdg | |
sdh | |
sdi | |
sdj | |
sdk |===========|
sdl |===========|
sdm |===========|
sdn |-----------|
md1 |=====| - 2 x 1TB RAID0 == 2TB
md2 |==== | - 5 x 1TB RAID6 == 3TB (degraded)
md3 |===========| - 5 x 2TB RAID6 == 6TB (degraded)
5. new arrays to free the old 2TB drives
and create an additional member for md4
---------------------------------------
sda |===========|
sdb |===========|
sdc |=====|
sdd |=====|
sde |= |
sdf |-----|
sdg |=====|
sdh |=====|
sdi |=====|
sdj |=====|
sdk | |
sdl | |
sdm |-----------|
sdn |-----------|
md4 | | - 4 x 1TB RAID10 == 2TB (degraded)
md1 |=====| - 2 x 1TB RAID0 == 2TB
md2 |==== | - 5 x 1TB RAID6 == 3TB (degraded)
md3 |======= | - 7 x 2TB RAID6 == 10TB
6. Moved rest of the data from md2,
dropped it and replaced a disk in md4
-------------------------------------
sda |===========|
sdb |===========|
sdc |=====|
sdg |=====|
sdh |=====|
sdj |=====|
sdk |===========|
sdl | |
sdm |-----------|
sdn |-----------|
md4 | | - 4 x 1TB RAID10 == 2TB (degraded)
md1 |=====| - 2 x 1TB RAID0 == 2TB
md3 |========= | - 7 x 2TB RAID6 == 10TB
And it only took two weeks! ;)
And again, thanks for all the pointers I got on the list, it all
happened without any data loss.
--
Michał (Saviq) Sawicz <michal@xxxxxxxxxx>
Attachment:
signature.asc
Description: This is a digitally signed message part
