ReadyNAS Duo v1 HDD replacement problems

soaring-eagle wrote:
Sorry, I forgot to include the version of RAIDiator my unit is running. It is running RAIDiator version 4.1.13.

That is the latest for your unit.

soaring-eagle wrote:

root@john-HP-Pavilion-dm4:/home/john# sudo su root@john-HP-Pavilion-dm4:/home/john# mkdir /mnt/lvm root@john-HP-Pavilion-dm4:/home/john# fuseext2 -o ro -o sync_read /dev/sdc1 /mnt/lvm/ fuse-umfuse-ext2: version:'0.4', fuse_version:'29' [main (fuse-ext2.c:331)] fuse-umfuse-ext2: enter [do_probe (do_probe.c:30)] fuse-umfuse-ext2: leave [do_probe (do_probe.c:55)] fuse-umfuse-ext2: opts.device: /dev/sdc1 [main (fuse-ext2.c:358)] fuse-umfuse-ext2: opts.mnt_point: /mnt/lvm/ [main (fuse-ext2.c:359)] fuse-umfuse-ext2: opts.volname: [main (fuse-ext2.c:360)] fuse-umfuse-ext2: opts.options: ro,sync_read [main (fuse-ext2.c:361)] fuse-umfuse-ext2: parsed_options: sync_read,ro,fsname=/dev/sdc1 [main (fuse-ext2.c:362)] fuse-umfuse-ext2: mounting read-only [main (fuse-ext2.c:378)] root@john-HP-Pavilion-dm4:/home/john#

The instructions on the link were not for mounting the 2GB OS partition, but rather for mounting the data volume.

soaring-eagle wrote:
I did view the secondary disk in Gparted and it only showed an 'unallocated' entry

The parity disk appears to be blank to your PC, but it isn't.

soaring-eagle wrote:
Is the procedure different for replacing a disk depending on if it's in slot 1 or slot 2?

Best to remove and replace the failed disk while the NAS is on.

soaring-eagle wrote:
Are there utilities that enable you to possibly fix disk errors?

Disks when they e.g. reallocate sectors will no longer uses the bad sectors. If a disk is having lots of errors then it is failing.