Same problem here, Ubuntu 3.5.0-25-generic #39-Ubuntu SMP Mon Feb 25 18:26:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux running on top of a 120 GB SSD (OCZ Agility 3 ) is systematically getting remounted as read only. I have already tried to minimize the IO on the / partition, by having some of the folders being mounted as tmpfs. 99sono@99sono-Satellite-A665:/tmp$ mount -l /dev/sda1 on / type ext4 (rw,noatime,nodiratime,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 /tmp type tmpfs (rw,noatime,mode=1777) 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) none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755) tmpfs on /var/tmp type tmpfs (rw,noatime,mode=1777) tmpfs on /var/log type tmpfs (rw,noatime,mode=0755) tmpfs on /var/log/apt type tmpfs (rw,noatime) /dev/sdb9 on /home/99sono/Documents/workspaceEclipse type ext4 (rw,nosuid,nodev,errors=remount-ro) [EclipseWorkspace] /dev/sdb5 on /home/99sono/Dropbox type ext4 (rw,nosuid,nodev,errors=remount-ro) [Dropbox] /dev/sdb6 on /home/99sono/Downloads type ext4 (rw,nosuid,nodev,errors=remount-ro) [Download] /dev/sdb7 on /home/99sono/SpiderOak type ext4 (rw,noexec,nosuid,nodev,errors=remount-ro) [SpiderOak] /dev/sdb8 on /var/cache type ext4 (rw,noatime,nodiratime,errors=remount-ro) [VarCache] (sda would be SSD sdb, is a plain usual SATA disk) According to all indications, It would appear that I have hardware problems... but in reality, i highly doubt it, the SSD has viratully no use and OCZ SSDs are reputed to be of top quality. So, unless OCZ has an underserved reputation, the ssd should still be in mint condition. dmesg lists log messages such as (sda1 would be the root partition): 1689 [ 6717.553653] Buffer I/O error on device sda1, logical block 1218984 1690 [ 6717.553655] Buffer I/O error on device sda1, logical block 1218985 1691 [ 6717.553657] Buffer I/O error on device sda1, logical block 1218986 1692 [ 6717.553659] Buffer I/O error on device sda1, logical block 1218987 1693 [ 6717.553661] Buffer I/O error on device sda1, logical block 1218988 1694 [ 6717.553663] Buffer I/O error on device sda1, logical block 1218989 1695 [ 6717.553665] Buffer I/O error on device sda1, logical block 1218990 1696 [ 6717.553667] Buffer I/O error on device sda1, logical block 1218991 1697 [ 6717.553669] Buffer I/O error on device sda1, logical block 1218992 1698 [ 6717.553671] Buffer I/O error on device sda1, logical block 1218993 1699 [ 6717.553673] Buffer I/O error on device sda1, logical block 1218994 1700 [ 6717.553675] Buffer I/O error on device sda1, logical block 1218995 1701 [ 6717.553677] Buffer I/O error on device sda1, logical block 1218996 1702 [ 6717.553679] Buffer I/O error on device sda1, logical block 1218997 1703 [ 6717.553681] Buffer I/O error on device sda1, logical block 1218998 1704 [ 6717.553683] Buffer I/O error on device sda1, logical block 1218999 1705 [ 6717.553685] Buffer I/O error on device sda1, logical block 1219000 1706 [ 6717.553687] Buffer I/O error on device sda1, logical block 1219001 1707 [ 6717.553688] Buffer I/O error on device sda1, logical block 1219002 1708 [ 6717.553690] Buffer I/O error on device sda1, logical block 1219003 1709 [ 6717.553693] Buffer I/O error on device sda1, logical block 1219004 1710 [ 6717.553695] Buffer I/O error on device sda1, logical block 1219005 1711 [ 6717.553697] Buffer I/O error on device sda1, logical block 1219006 1758 [ 6717.553790] Buffer I/O error on device sda1, logical block 1219053 1759 [ 6717.553793] EXT4-fs warning (device sda1): ext4_end_bio:250: I/O error writing to inode 1970257 (offset 228065280 size 450560 starting block 1219310) 1760 [ 6717.553799] sd 1:0:0:0: [sda] 1761 [ 6717.553800] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE 1762 [ 6717.553802] sd 1:0:0:0: [sda] 1763 [ 6717.553804] Sense Key : Aborted Command [current] [descriptor] 1764 [ 6717.553806] Descriptor sense data with sense descriptors (in hex): 1765 [ 6717.553807] 72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 1766 [ 6717.553815] 0a 80 09 30 1767 [ 6717.553819] sd 1:0:0:0: [sda] 1768 [ 6717.553820] Add. Sense: No additional sense information 1769 [ 6717.553822] sd 1:0:0:0: [sda] CDB: 1770 [ 6717.553824] Write(10): 2a 00 0a 2b f9 b0 00 00 08 00 1771 [ 6717.553830] end_request: I/O error, dev sda, sector 170654128 1772 [ 6717.553833] Buffer I/O error on device sda1, logical block 21331510 1773 [ 6717.553836] EXT4-fs warning (device sda1): ext4_end_bio:250: I/O error writing to inode 2759709 (offset 0 size 4096 starting block 21331767) 1774 [ 6717.553841] sd 1:0:0:0: [sda] 1775 [ 6717.553843] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE 1776 [ 6717.553845] sd 1:0:0:0: [sda] 1777 [ 6717.553846] Sense Key : Aborted Command [current] [descriptor] 1778 [ 6717.553849] Descriptor sense data with sense descriptors (in hex): 1779 [ 6717.553850] 72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 1780 [ 6717.553858] 0a 80 09 30 1781 [ 6717.553861] sd 1:0:0:0: [sda] 1782 [ 6717.553863] Add. Sense: No additional sense information 1783 [ 6717.553865] sd 1:0:0:0: [sda] CDB: 1784 [ 6717.553866] Write(10): 2a 00 00 81 0e c8 00 00 08 00 1785 [ 6717.553873] end_request: I/O error, dev sda, sector 8457928 1786 [ 6717.553875] Buffer I/O error on device sda1, logical block 1056985 1787 [ 6717.553878] EXT4-fs warning (device sda1): ext4_end_bio:250: I/O error writing to inode 2759709 (offset 458752 size 4096 starting block 1057242) 1788 [ 6717.553883] sd 1:0:0:0: [sda] 1789 [ 6717.553884] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE 1790 [ 6717.553887] sd 1:0:0:0: [sda] 1791 [ 6717.553888] Sense Key : Aborted Command [current] [descriptor] 1792 [ 6717.553890] Descriptor sense data with sense descriptors (in hex): 1793 [ 6717.553891] 72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 1794 [ 6717.553899] 0a 80 09 30 1795 [ 6717.553902] sd 1:0:0:0: [sda] .... 2028 [ 6717.554576] Sense Key : Aborted Command [current] [descriptor] 2029 [ 6717.554578] Descriptor sense data with sense descriptors (in hex): 2030 [ 6717.554579] 72 0b 00 00 00 00 00 0c 00 0a 80 00 00 00 00 00 2031 [ 6717.554587] 0a 80 09 30 2032 [ 6717.554591] sd 1:0:0:0: [sda] 2033 [ 6717.554592] Add. Sense: No additional sense information 2034 [ 6717.554594] sd 1:0:0:0: [sda] CDB: 2035 [ 6717.554595] Write(10): 2a 00 0a 80 09 30 00 00 08 00 2036 [ 6717.554602] end_request: I/O error, dev sda, sector 176163120 2037 [ 6717.554608] ata2: EH complete 2038 [ 6717.554893] JBD2: Detected IO errors while flushing file data on sda1-8 2039 [ 6725.996860] EXT4-fs error (device sda1) in ext4_new_inode:935: IO failure 2040 [ 6725.996867] EXT4-fs (sda1): previous I/O error to superblock detected 2041 [ 6725.996984] Aborting journal on device sda1-8. And then The Grand finally. 2042 [ 6725.997084] EXT4-fs (sda1): Remounting filesystem read-only 2043 [ 6725.997096] EXT4-fs error (device sda1) in ext4_create:2120: IO failure I restart the system, get told there were file system errors, press F to try to fix, and in a couple of hours if I see a movie or start working on Eclipse, well, same story.