Package: debian-installer Version: 20170615+deb9u1 Severity: wishlist --- Please enter the report below this line. ---
Hi, since SSDs are becoming more and more common it would be great to see support for TRIM command enabled in the debian-installer. It took me quite some time to figure out how to do this (again, because the last time I had to look up the commands was four years ago). Since not everyone likes to have TRIM support enabled, it would be apropriate to have this as an option if an SSD is detected, maybe even only in the expert install option. (In my opinion TRIM should be enabled by default, because regular users don't know what TRIM is, but still want it enabled) To figure out if a device has TRIM capability you can use hdparm: hdparm -I /dev/sdX | grep 'TRIM' If the user is using LVM then TRIM has also enabled in the lvm.conf by adding issue_discards = 1 to the devices section. If the user is using dmcrypt (and this is be the point where it might be problematic to use TRIM, see [0]) then it has to be enabled in the crypttab file by adding "discard" to the target options. As final step it is necessary to enable the discard feature for the filesystem or run fstrim regularly, if the filesystem supports it. It is recommend to run fstrim regularly, because the discard feature is said to be slow, because it runs a trim on every file deletion. It should be better to run fstrim daily or weekly by a script. Please see [1] for more detailed information about how to enable TRIM. There's also a script shown that does fstrim. It does it's job, although I recommed to whitelist the supported filesystems, since fstrim fails for vfat, which is used for EFI partitions everywhere now and lsblk lists them as valid targets to fstrim. Best regards Matthias [0] http://asalor.blogspot.de/2011/08/trim-dm-crypt-problems.html [1] http://blog.neutrino.es/2013/howto-properly-activate-trim-for-your-ssd-on-linux-fstrim-lvm-and-dmcrypt/ --- System information. --- Architecture: Kernel: Linux 4.11.0-trunk-amd64 Debian Release: buster/sid 500 unstable ftp.de.debian.org 500 oldstable-proposed-updates ftp.de.debian.org 1 experimental ftp.de.debian.org --- Package information. --- Package's Depends field is empty. Package's Recommends field is empty. Package's Suggests field is empty.
