How to create partition when growing raid5 with mdadm.
- by hometoast
I have 4 drives, 2x640GB, and 2x1TB drives.
My array is made up of the four 640GB partitions and the beginning of each drive.
I want to replace both 640GB with 1TB drives.
I understand I need to
1) fail a disk
2) replace with new
3) partition
4) add disk to array
My question is, when I create the new partition on the new 1TB drive, do I create a 1TB "Raid Auto Detect" partition? Or do I create another 640GB partition and grow it later?
Or perhaps the same question could be worded: after I replace the drives how to I grow the 640GB raid partitions to fill the rest of the 1TB drive?
fdisk info:
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xe3d0900f
Device Boot Start End Blocks Id System
/dev/sdb1 1 77825 625129281 fd Linux raid autodetect
/dev/sdb2 77826 121601 351630720 83 Linux
Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xc0b23adf
Device Boot Start End Blocks Id System
/dev/sdc1 1 77825 625129281 fd Linux raid autodetect
/dev/sdc2 77826 121601 351630720 83 Linux
Disk /dev/sdd: 640.1 GB, 640135028736 bytes
255 heads, 63 sectors/track, 77825 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x582c8b94
Device Boot Start End Blocks Id System
/dev/sdd1 1 77825 625129281 fd Linux raid autodetect
Disk /dev/sde: 640.1 GB, 640135028736 bytes
255 heads, 63 sectors/track, 77825 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xbc33313a
Device Boot Start End Blocks Id System
/dev/sde1 1 77825 625129281 fd Linux raid autodetect
Disk /dev/md0: 1920.4 GB, 1920396951552 bytes
2 heads, 4 sectors/track, 468846912 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk identifier: 0x00000000
