On 5/31/2017 8:04 AM, m.roth at 5-cent.us wrote: > I've got an old RAID that I attached to a box. LSI card, and the RAID has > 12 drives, for a total RAID size of 9.1TB, I think. I started shred > /dev/sda the Friday before last... and it's still running. Is this > reasonable for it to be taking this long...? not at all surprising, as that raid sounds like its built with older slower drives. I would discombobulate the raid, turn it into 12 discrete drives, and use dd if=/dev/zero of=/dev/sdX bs=65536 on each drive, running these concurrently unless that volume has data that requires military level destruction, where upon the proper method is to run the drives through a grinder so they are metal filings. the old DoD multipass erasure specification is long obsolete and was never that great. -- john r pierce, recycling bits in santa cruz