Hello
I tried to send this email via gmane, but I never saw it on that list, so I resend it. Using a Thinkpad Laptop with a new Samsung ssd, I have installed kubuntu 10.04 and chosen jfs. Since 10.04 is too old to support trimming, I compiled and installed kernel 3.7 and complied fstrim. The relevant entry of my fstab reads as follows. UUID=8e06979b-2dbf-4192-8513-957bafa74a1e / jfs nodiratime,noatime,errors=remount-ro 0 The recommendation to use nodiratime and noatime for ssd I found for example in http://askubuntu.com/questions/1400/how-do-i-optimize-the-os-for-ssds I run fstrim periodically via cron and everything seems fine. However from time to time by system ends up to be mounted *read-only*. dmesg gives errors like this: [105074.721310] ERROR: (device sda5): dbDiscardAG: no memory for trim array (I could send the complete result of dmesg, but it is large. I obtained it by dmesg | pastebinit). Since the fstab entry states errors=remount-ro I presumed this is the source for the read only remount. I can remount my hard disk and continue as if nothing has happened or I can reboot. In any case I would like to know: - what can I do to prevent this problem, since it is annoying and might result in loss. - is it safe just to remount or should I reboot? Thanks and regards Uwe Brauer
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