A quick how-to add a `large` disk to a linux system. Why?
Because I just realized how confusing and bad-written
a similar post of mine is and because tonnes of friends and acquaintances just bought a `hot` in Greece microserver along with extra 3TB hard drives. This way I may not have to set them up all.
See the disks.
# lshw -C disk
*-disk:0
description: ATA Disk
product: VB0250EAVER
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: HPG7
serial: Z3T174VN
size: 232GiB (250GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=00008cb6
*-disk:1
description: ATA Disk
product: WDC WD30EFRX-68A
vendor: Western Digital
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/sdb
version: 80.0
serial: WD-WMC1T2590452
size: 2794GiB (3TB)
capabilities: gpt-1.00 partitioned partitioned:gpt
configuration: ansiversion=5 guid=a605f0d3-a21a-4fee-b805-59946c3516b8
*-disk:2
description: ATA Disk
product: WDC WD30EFRX-68A
vendor: Western Digital
physical id: 0.0.0
bus info: scsi@2:0.0.0
logical name: /dev/sdc
version: 80.0
serial: WD-WMC1T2588956
size: 2794GiB (3TB)
configuration: ansiversion=5
See partitions seen by the system.
# cat /proc/partitions
major minor #blocks name
8 0 244198584 sda
8 1 242232320 sda1
8 2 1 sda2
8 5 1964032 sda5
8 16 2930266584 sdb
8 17 2930265088 sdb1
8 32 2930266584 sdc
and what is mounted where along with file system usage.
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 228G 1.5G 215G 1% /
udev 930M 4.0K 930M 1% /dev
tmpfs 376M 232K 376M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 939M 0 939M 0% /run/shm
/dev/sdb1 2.7T 201M 2.7T 1% /data01
Apparently the new one is at /dev/sdc.
Set gpt and create one large partition
# parted /dev/sdc
GNU Parted 2.3
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
(parted) mkpart primary 0GB 3001GB
(parted) print
Model: ATA WDC WD30EFRX-68A (scsi)
Disk /dev/sdc: 3001GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 3001GB 3001GB primary
(parted) quit
Information: You may need to update /etc/fstab.
Format with ext4 the new partition
# mkfs.ext4 /dev/sdc1
mke2fs 1.42 (29-Nov-2011)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
183148544 inodes, 732566272 blocks
36628313 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
22357 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848, 512000000, 550731776, 644972544
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
Create a mount directory.
# mkdir /data02
Mount the new partition.
# mount /dev/sdc1 /data02
See mounted partitions and File System Usage.
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 228G 1.5G 215G 1% /
udev 930M 4.0K 930M 1% /dev
tmpfs 376M 236K 376M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 939M 0 939M 0% /run/shm
/dev/sdb1 2.7T 201M 2.7T 1% /data01
/dev/sdc1 2.7T 201M 2.6T 1% /data02
Unmount the new partition.
# umount /data02
make sure it is not mounted.
# mount
/dev/sda1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
/dev/sdb1 on /data01 type ext4 (rw)
Reclaim the 5% reserved for the system.
# tune2fs -m 0 /dev/sdc1
tune2fs 1.42 (29-Nov-2011)
Setting reserved blocks percentage to 0% (0 blocks)
Add the new partition and mount point to fstab.
# echo "/dev/sdc1 /data02 ext4 defaults 0 2" >> /etc/fstab
Mount everything on fstab.
# mount -a
See what is mounted where and filesystem usage again!
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 228G 1.5G 215G 1% /
udev 930M 4.0K 930M 1% /dev
tmpfs 376M 236K 376M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 939M 0 939M 0% /run/shm
/dev/sdb1 2.7T 201M 2.7T 1% /data01
/dev/sdc1 2.7T 201M 2.7T 1% /data02
done.
Adding a 3TB drive - Linux
