NV+ boot hangs on checking FS

I finally got the drives installed into my linux box. My boot device is /dev/sdb and the four drives from the NAS are /dev/sda, /dev/sdc, /dev/sdd, and /dev/sde. I see four partitions sdx1, sdx2, sdx3, and sdx5 on all the devices but sde which shows nothing. Running pvdisplay finds volumes on sda5, sdc5, and sdd5, and obviously nothing on sde. Running lvdisplay shows me the logical volume C. So it looks like I lost a disk, but the RAID may make the logical volume still readable.

I then checked the drive health by running smartctl -a

sda:

SMART overall-health self-assessment test results: failed
Drive failure expected in less than 24 hours. SAVE ALL DATA.

Apparently there have been nearly 33000 errors on the drive.

sdc: passed with no errors

sdd: passed with no errors

sde: passed with no errors

So it seems like sda is failing/has failed.

I haven't tried to mount the devices yet. Should I stick sda, sdc, and sdd into the NAS and see if it can boot with the 2 good disks and the one hopefully failing disk? Do I try and mount the LV directly from my Linux box? Do I just give up now? Is it worth trying to reconstruct the partitions table on sde with the hope that maybe only the partition table was lost?