I have RN102 2 bay with 2 Seagate Barracuda ST2000DM001 2TB - 7200 rpm in Raid1 configuration. One of the disks has died and need a replacement one, but seems ST2000DM001 is not avaialble anymore in the market(not sure if its End of Life).
Can we use ST2000DM008 seagate as a replacement one?
A General slightly dumb question..... I mistakenly ordered a seagate ST2000DM005 2TB, but with only 5400 rpm .... I am guess that it would not ideally work with the current one ST2000DM001 which is 7200 rpm in the RN102. So should both disks in the RN 102 or more generally in any NAS "must be identical"?
Alternatively would RN102 will still work if we have two disks with different RPMs : 1 as 7200 rpm and other 5400 rpm as well?
Re: RN102 Disk replacement for Barrecuda ST2000DM001
The ST2000DM005 and ST2000DM008 are SMR (Shingled Magnetic Recording) drives and not well suited for a NAS. IMHO, no DM desktop drive has ever been well suited for a NAS.
While the NAS will complain about mismatched rotation speeds, I know of no specific evidence that mixing them creates a reliability issue or performance hit on a small NAS.
Your best bet is to get a NAS purposed drive, but not a WD Red, which is also SMR. The WD Red Plus or Red Pro or the Seagate Ironwolf or Ironwolf Pro are all CMR (Conventional Magnetic Recording). The Red Pro and Ironwolf Pro are the only 7200RPM drives in that list.
A 2TB drive is also not very cost effective when it comes to cost per megabyte. Since your other drive will also wear out (possibly soon if it's the same age as the failed one), using a larger replacement one now will expand the volume once you replace the other one with a similary sized drive. And most people's storage requirements just seem to keep growing.
