Mark Lord wrote: ..
Slow, but presumably thorough. Subsequent runs were equally slow. The problem is, it still issues TRIMs to the LLD one extent at a time. Compare this with doing it all in a single TRIM command with the wiper.sh script (filesystem unmounted): [~] time wiper.sh /dev/sdb3 --commitwiper.sh: Linux SATA SSD TRIM utility, version 1.9b, by Mark Lord. Preparing for offline TRIM of free space on /dev/sdb3 (xfs non-mounted).This operation could destroy your data. Are you sure (y/N)? y Syncing disks.. Beginning TRIM operations.. Trimming 168 free extents encompassing 8793136 sectors (4294 MB) Done.real 0m1.249suser 0m0.110s sys 0m0.063s That includes the time for me to type 'y' and hit enter. :)
.. For completeness, here's the same operation again, except this time on the *mounted* xfs filesystem. It won't be trimming quite as many blocks (leaves 1% free space in reserve), but otherwise is similar: [~] time wiper.sh /dev/sdb3 --commit wiper.sh: Linux SATA SSD TRIM utility, version 1.9b, by Mark Lord. Preparing for online TRIM of free space on /dev/sdb3 (xfs mounted read-write at /x). This operation could destroy your data. Are you sure (y/N)? y Creating temporary file (4348405 KB).. Syncing disks.. Beginning TRIM operations.. Trimming 134 free extents encompassing 8696816 sectors (4246 MB) Removing temporary file.. Syncing disks.. Done. real 0m1.212s user 0m0.043s sys 0m0.053s -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
