Lets add in 'environmentals' too.

Ive been on site and seen:

120d ambient temp machine rooms. Racks with running filers being moved across a room by hammering a pipe at the base of the rack. Shelves dropped. Drives dropped. Heads dropped. A & B power supplies all on the same curcuit (causes FCAL brown out badness in a lot of cases) Leaky styrofoam cups placed on the filer head. Drives SLAMMED home when replaced/installed by customer. Stripped screws securing a shelf having the heads hammered off with a chisel..with the shelf/drives still spinning

..and the winner...

...a serial cable in place of a FCAL jumper cable.

-----Original Message----- From: Bruce Sterling Woodcock [mailto:sirbruce@ix.netcom.com] Sent: Monday, July 31, 2000 1:18 AM To: Mohler,Anissa; 'Brian Tao' Cc: toasters@mathworks.com Subject: Re: Netapp filesystem failure rate

As far as actual field numbers... I really don't know ;(

Actual field numbers would no doubt be greater, since you are dealing with a wider variety of drives over history (presumably some less reliable than the current ones) and you also have some rare software / firmware bugs that probably necessitated a restore once or twice.

Bruce