| maples |
04-29-2015 07:20 PM |
Shrinking software RAID 0
Hi,
I have a software RAID on my home server that spans 3 drives. Two of the drives are entirely dedicated to the RAID, the third also has my / and /home partitions:
Code:
root@maples-server:/home/anthony# fdisk -l
Disk /dev/sda: 279.5 GiB, 300069052416 bytes, 586072368 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0008bede
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 39063551 39061504 18.6G 83 Linux
/dev/sda3 39063552 97656831 58593280 28G 83 Linux
/dev/sda4 97656832 586072063 488415232 232.9G 83 Linux
Disk /dev/sdd: 74.5 GiB, 80026361856 bytes, 156301488 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0004962e
Device Boot Start End Sectors Size Id Type
/dev/sdd1 2048 20973567 20971520 10G 82 Linux swap / Solaris
/dev/sdd2 20973568 156301311 135327744 64.5G 83 Linux
Disk /dev/sdc: 232.9 GiB, 250000000000 bytes, 488281250 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00075241
Device Boot Start End Sectors Size Id Type
/dev/sdc1 2048 488280063 488278016 232.8G 83 Linux
Disk /dev/sdb: 232.9 GiB, 250000000000 bytes, 488281250 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00017cc3
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 488280063 488278016 232.8G 83 Linux
Disk /dev/md0: 698.6 GiB, 750063714304 bytes, 1464968192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1572864 bytes
sda1 is my /
sda3 is my /home
sda4 is the member of the RAID
sdb and sdc are the other two disks in the RAID.
I would like to remove sda4 (to make room to expand sda3). Is it possible to do this without needing to completely re-do the RAID? Or is that just not possible, given the way that RAID 0 stripes the data? |
