Hi to all.
I have the following raid1:
/dev/md0:
Version : 1.2
Creation Time : Tue Dec 27 21:35:37 2016
Raid Level : raid1
Array Size : 292836608 (279.27 GiB 299.86 GB)
Used Dev Size : 292836608 (279.27 GiB 299.86 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Tue Jul 30 12:58:34 2019
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : x:0 (local to host x)
UUID : d8599926:69a5c35a:66a167d4:5a464a7b
Events : 68628
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
2 8 17 1 active sync /dev/sdb1
# pvs
PV VG Fmt Attr PSize PFree
/dev/md0 vg1 lvm2 a-- 279.27g 120.27g
# vgs
VG #PV #LV #SN Attr VSize VFree
vg1 1 7 0 wz--n- 279.27g 120.27g
# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log
Cpy%Sync Convert
lv_boot vg1 -wi-ao---- 1.00g
lv_log vg1 -wi-ao---- 50.00g
lv_mysql vg1 -wi-ao---- 20.00g
lv_root vg1 -wi-ao---- 20.00g
lv_swap vg1 -wi-ao---- 8.00g
lv_tmp vg1 -wi-ao---- 10.00g
lv_www vg1 -wi-ao---- 50.00g
as I need more space and I have some free slots on the server, can I
replace 1 by 1 (by adding a new disk and removing the old one from the
array when done), with some SSDs ?
Something like this:
# Sync disk partitions
sfdisk --dump /dev/sda | sfdisk /dev/sdc
sfdisk --dump /dev/sdb | sfdisk /dev/sdd
# Rebuild array
mdadm /dev/md0 --add /dev/sdc1
mdadm /dev/md0 --replace /dev/sda1 --with /dev/sdc1
mdadm /dev/md0 --add /dev/sdd1
mdadm /dev/md0 --replace /dev/sdb1 --with /dev/sdd1
This should replace, with no loss of redundancy, sda with sdc and sdb with sdd.
Then I have to re-install the bootloaded on new disks and reboot to
run from the SSDs
Any thoughts ? What about LVM ? By syncing the disk partitions and
the undelying array, LVM should be up & running on next reboot
automatically, even if moved from SAS to SSD, right ?
