HDD SATA I kind of hate HDDs right now

[DaveR]

Mods: Feel free to move this if it's in the wrong forum.

Last Thursday I had one of the 6TB HDDs in my old DS1812+ develop 369 bad sectors but was still showing as healthy. I thought I might as well buy larger drives for my DS1821+ and move it's drive to my Asustor and move it's drives to the old DS1812+.

So my plan was:

1. Buy 4 x 20TB or larger HDDs for the DS1821+. The 4 x 20TB would cost $2900 to $3400 AUD.
2. Move the DS1821+'s 4 x 16TB HDDs to my Asustor.
3. Move the Asustor's 4 x 12TB HDDs to the old DS1812+.
4. Step 3 would require 4 new 12TB HDDs as the DS1812+ is using RAID 6, and not SHR-2. The 4 x 12TB would cost $1800 AUD.

All that would require 16 RAID rebuilds and would take a month.

So for $5000 AUD I would gain:

• Only 12TB on the DS1821+ (which currently has 23TB free).
• Only 11TB on the Asustor (which currently has 12TB free).
• And extra 32TB on the DS1812+ (which currently has 12TB free).
• 7 used 6TB HDDs that I could use in the DS925+ and DX213.

Then I considered how much longer is the old DS1812+ going to continue working and was it worth the expense and time.

So on Friday I took the cheap and fast option and ordered 1 x new 6TB HDD for the DS1812+ for $289 AUD.

As the RAID rebuild progressed I occasionally got messages of "I/O connection errors due to possible bad sectors" on a different HDD. Today the RAID rebuild finally finished and my scheduled quick SMART scan started and immediately another 6TB HDD crashed with 490 bad sectors

So today I ordered a 2nd 6TB HDD... when I really don't want to be buying 6TB HDDs. I kind of wish I'd bought 4 x 12TB HDDs instead of 2 x 6TB HDDs.