Again, 2 hard drives failed at the same time. Hardware Raid 5 with a hot-spare.

How many times is this for me now?

I've had 2 drives fail on me with Mirroring with and without hot-spares.

I'm like 4 out of 5 drive failure events blow up my hardware.

I am just glad we have a second machine in place for load balancing.

73GB 15K RPM SCSI drives are becoming a scarcity... Used is about all we can find.

Refurbished used to be available... not anymore. fsck me!

Its currently not rec'd for using SSD in a hardware raid configuration. Multiple algorithmic functions competing for optimizations... except for mirroring.

One "original" drive in the machine and one of the "refurbished" drives failed at the same time. So... something killed 'em both.

I'm still pissed at these controller manufacturers they don't get it.

Since my beginning of doing computers for work... purchasing up to $10,000 (6 channel caching) disk controllers and Multi-path setups costing even more because of the SAN back end.

Sadly Box... we are talk 4 out of every 5 disk failure events result in losing the array... be it a Mirror, Duplex, a RAID5 or RAID50 or a SAN...

I've lost mirrors due to corruption caused by the controller writing bad data due to the "failed disk" causing the controller to screw up.

On Duplex setups... lets just say Garbage In, Garbage Out.

I've lost Raid 5 Arrays multiple times due to multiple simultaneous disk failures (even on distinctly different ages/manufacturers of drives).

On RAID50, I lost a controller and the newest driver that was installed on the system before the loss (on AIX), caused the whole shelf to be lost.

The Multi-path SAN stuff... we lost multiple storage blocks due to a single drive error and even lost the FLASH SNAPSHOTs of the storage blocks.

I am just not at all impressed with Hardware RAID controllers or even these expensive SAN systems.

Just so you know, the reason the ratio is 4 out of 5, we had a NetAPP FAS250 that had multiple failures of disks... never once was it out of service due to the disk failures. We swapped the drives and assigned them to the unit... voila. Worked good as ever. The only problem we really had with the FAS250 was non-redundant heads. We had a hiccup a few years back once. Replacement took more than 6 hours... (guaranteed to be less than 4 hours). After that event we found out that we could have had redundant heads... but due to the age of the machine NetAPP would not sell us an additional one and would not support us buying a used one... feh.

Buhbye NetAPP.

As far as *I AM* concerned Linux's MD RAID setup has only ever bitten me once. That was with my personal 600MHz file server. I had two arrays of 4 disks each appended together. I had two MD (md0 and md1) they had PVs one them... I added them all to a single LV. I lost a single drive in the older set of disks, which meant the hot spare should have kicked in... This being a 2.4.22 kernel and I had not updated in forever to get a new one... it never "noticed" the dropped drive to begin the rebuild... It just dropped the data and never rebuilt it... and before I noticed it was to late.

I lost nearly 33% of my music (read errors resulting in zero length files) and almost 100% of video and XBOX game images (same zero length thing)

Of course, I had no backups for my personal shi^H^Htuff. 3.4TB back a few years ago, was insane to have backed up for personal stuff.