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ytsejam

Member

Registered: 2012-02-10

Posts: 56

(solved)Using SSD and HDD together fstab values

Hello,

I am trying to use SSD and HDD together. I want to use /var and /tmp on my magnetic drive. When I try to edit /etc/fstab system failed.
How can I edit my fstab correctly ? What are correct options for magnetic drive(dev/sdb9 and dev/sdb10) ?

# 
# /etc/fstab: static file system information
#
# <file system>	<dir>	<type>	<options>	<dump>	<pass>
# /dev/sda3
UUID=7c2d4ffc-eb76-481f-acab-6ec19c72d2a6	/         	ext4      	defaults,noatime,discard	0 1

# /dev/sda4
UUID=72bb2cab-cde2-4772-b6fb-16df655c95f2	/home     	ext4      	defaults,noatime,discard	0 2

# /dev/sdb9
UUID=b4454847-fe89-4137-b1f8-c3014b369cee	/var      	ext4      	defaults,mode=755		0 2

# /dev/sdb10
UUID=de9bc0e0-edbb-4f25-a66f-b14bca28da8d	/tmp      	ext4      	defaults,mode=755		0 2
tmpfs     					/home/ytsejam/.mozilla/firefox/default/Cache tmpfs mode=1777,noatime 0 0
tmpfs     					/scratch     	tmpfs     	nodev,nosuid,size=7G     	0 0
# /dev/sdb11
UUID=9e82aa3d-5be7-4a4b-a58c-747b97428cf6	none      	swap      	defaults  	0 0

thanks.

Last edited by ytsejam (2014-01-30 12:31:51)

frostschutz

Member

Registered: 2013-11-15

Posts: 1,421

Re: (solved)Using SSD and HDD together fstab values

You don't usually use mode= options with ext4 (and other Linux) filesystems. If you want these filesystems to have a specific mode or ownership, you have to mount them, and then set the ownerships with chmod / chown. In particular check that your /tmp/ filesystem was writable (chmod 1777 /tmp/.).

Other than that there is nothing wrong with your fstab. You could use noatime for /var and /tmp as well, but that doesn't stop things from working, it's merely a performance consideration as usually no one needs atime anyway.

If you are not particularly low on RAM, it is more common to use tmpfs for /tmp. I would not put /var on magnetic drive either; I'd be more specific there, like do a HDD partition for /var/www/ if that's where you have huge stuff.

Last edited by frostschutz (2014-01-30 09:31:09)

ytsejam

Member

Registered: 2012-02-10

Posts: 56

Re: (solved)Using SSD and HDD together fstab values

Thank you solved my problem.