I didn't attempt the recovery, I put a new drive in to replace this drive.
Shortly after starting recovery, disk 8 reported an I/O error too and has been disabled.
These drives are old and have a lot of uptime but seems to be a strange coincidence that they would both die together so soon.
To rule out heat issues I've pointed fans at my SAS devices.
I've also ordered some higher quality SAS cables.
Going to be keeping an eye on the SAS controller & HBA, it has been fine for months and my drives are old, so could just be a coincidence.
I'm currently using the following SAS devices:
IBM SAS HBA M1015 IT Mode 6Gbps PCI-e 2.0 x8 LSI 9220-8i
Intel 24 port 6 Gb/s SATA SAS RAID Expander Card PBA E91267-203 RES2SV240
