[CentOS] CentOS 6.9, shredding a RAID

Wed May 31 15:04:19 UTC 2017
m.roth at 5-cent.us <m.roth at 5-cent.us>

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...?