Difference between revisions of "Server Administration"
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== Install new hard drive == | == Install new hard drive == | ||
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| + | (This link provides a good description of the process: https://help.ubuntu.com/community/InstallingANewHardDrive) | ||
| + | |||
| + | (This link for hard drives larger than 2.0TB: http://www.cyberciti.biz/tips/fdisk-unable-to-create-partition-greater-2tb.html) | ||
| + | |||
After plugging in new hard drive, find the drive by typing | After plugging in new hard drive, find the drive by typing | ||
| − | + | ls /dev/sd* | |
The new drive show show up here in this list. In this case, it is /dev/sdc | The new drive show show up here in this list. In this case, it is /dev/sdc | ||
fdisk /dev/sdc | fdisk /dev/sdc | ||
| − | Using fdisk, create a new Linux partition containing the entire hard drive. | + | Using fdisk, create a new Linux partition containing the entire hard drive. fdisk command m (for help), n (to add a new partition) and w (to write table to disk and exit). Defaults are recommended for the partition (one primary partition). |
mkfs.ext3 -m 0 /dev/sdc1 | mkfs.ext3 -m 0 /dev/sdc1 | ||
Format this new partition as ext3. By default, this reserves 5% of the disk for root. To remove this reservation, with use "-m 0". This can be changed later with "tune2fs -m 0 /dev/sdc1". | Format this new partition as ext3. By default, this reserves 5% of the disk for root. To remove this reservation, with use "-m 0". This can be changed later with "tune2fs -m 0 /dev/sdc1". | ||
| + | Alternatively, one can use mkfs.ext4 instead of mkfs.ext3 to format the partition as ext4 which is backward compatible with ext3. Or simply using "mkfs -t ext4 -m 0 /dev/sdc1" to do the same thing faster. | ||
| + | |||
Now create a new mount point in /media.. | Now create a new mount point in /media.. | ||
mkdir /media/new_drive | mkdir /media/new_drive | ||
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/dev/sdb1 459G 232G 204G 54% /media/sdb1 | /dev/sdb1 459G 232G 204G 54% /media/sdb1 | ||
/dev/sdc1 917G 109M 871G 1% /media/hdock | /dev/sdc1 917G 109M 871G 1% /media/hdock | ||
| + | |||
| + | Before accessing the newly mounted hard drive, make sure you change the access permissions on the directory first | ||
| + | chmod 777 /media/new_drive | ||
| + | |||
In case you are having trouble unmounting a volume, use lazy unmount -l. This does not force an unmount, rather it waits until the device stops being busy. | In case you are having trouble unmounting a volume, use lazy unmount -l. This does not force an unmount, rather it waits until the device stops being busy. | ||
umount -l hdock/ | umount -l hdock/ | ||
| + | |||
| + | For the hard drive plugged in the dock, you might have input/output error with the drive if it switch from /dev/sde to /dev/sdf. To solve the problem, use UUID instead of the /dev/sd* directory name in the /etc/fstab. To obtain UUID, use command "blkid" or "ls /dev/disk/by-uuid". | ||
Latest revision as of 11:09, 7 March 2014
Updating the server
Install yumex (YUM eXtender GUI for yum)
sudo yum install yumex
Install new hard drive
(This link provides a good description of the process: https://help.ubuntu.com/community/InstallingANewHardDrive)
(This link for hard drives larger than 2.0TB: http://www.cyberciti.biz/tips/fdisk-unable-to-create-partition-greater-2tb.html)
After plugging in new hard drive, find the drive by typing
ls /dev/sd*
The new drive show show up here in this list. In this case, it is /dev/sdc
fdisk /dev/sdc
Using fdisk, create a new Linux partition containing the entire hard drive. fdisk command m (for help), n (to add a new partition) and w (to write table to disk and exit). Defaults are recommended for the partition (one primary partition).
mkfs.ext3 -m 0 /dev/sdc1
Format this new partition as ext3. By default, this reserves 5% of the disk for root. To remove this reservation, with use "-m 0". This can be changed later with "tune2fs -m 0 /dev/sdc1". Alternatively, one can use mkfs.ext4 instead of mkfs.ext3 to format the partition as ext4 which is backward compatible with ext3. Or simply using "mkfs -t ext4 -m 0 /dev/sdc1" to do the same thing faster.
Now create a new mount point in /media..
mkdir /media/new_drive
Edit /etc/fstab to add the new drive, such as the line
/dev/sdc1 /media/new_drive ext3 defaults,user,rw 0 0
Now mount the new partition using
mount /media/new_drive
Use df to make sure the new drive is up and you have the right amount of free space
Filesystem Size Used Avail Use% Mounted on /dev/sda1 99M 87M 7.5M 93% /boot /dev/sdb1 459G 232G 204G 54% /media/sdb1 /dev/sdc1 917G 109M 871G 1% /media/hdock
Before accessing the newly mounted hard drive, make sure you change the access permissions on the directory first
chmod 777 /media/new_drive
In case you are having trouble unmounting a volume, use lazy unmount -l. This does not force an unmount, rather it waits until the device stops being busy.
umount -l hdock/
For the hard drive plugged in the dock, you might have input/output error with the drive if it switch from /dev/sde to /dev/sdf. To solve the problem, use UUID instead of the /dev/sd* directory name in the /etc/fstab. To obtain UUID, use command "blkid" or "ls /dev/disk/by-uuid".
