October 20, 20214 yr Hey so, I wanted to add a second cache disk to my unraid. What I did was, stop the array, added a new SSD as a second cache disk, started the array. The first cache disk showed "mounting" and the second said "part of pool" (or something similar). And then suddenly the webinterface crashed and I can't ping the machine anymore (Destination host unreachable). I can still hear my drives spinning and accessing data occasionally. STS LED on my network adapter is just blinking, ACT LED is constant green. External monitor gets a signal but doesn't show any picture. I'm scared to just reboot the machine, but what other option do I have? Edited October 20, 20214 yr by shrtrnd
October 21, 20214 yr Community Expert See if you get the diags or at least the syslog using the console, if not you'll need to force a reboot.
October 21, 20214 yr Author Yeah it was completely unresponsive, let it running all night and did a force reboot just now. Everything seems to be working normally again. No idea what happened there. Thanks! One other question if I may ask. My old cache disk is/was 250GB. I added a second 500GB disk and was planning on replacing the 250GB disk now. Currently my cache disk size shows 375GB which confuses me a bit. I thought it would just show 250GB. Can I just stop the array, remove the 250GB cache disk, add the second 500GB disk I bought and start the array again? Or are there any extra steps?
October 21, 20214 yr Community Expert Older Unraid releases will show wrong stats when using different size devices, but still only 250GB will be usable in default raid1. 1 hour ago, shrtrnd said: Can I just stop the array, remove the 250GB cache disk, add the second 500GB disk I bought and start the array again? Yes, if you're still on v6.8.x or older, cache replacement is broken on v6.9.x or newer, though you can still remove one device, then add the other one.
October 21, 20214 yr Author No I'm on 6.9.2. Does that mean I can't replace them at all or do I need to go the long route? Meaning stop docker etc, set everything to cache: yes, move, replace, set everything back, move, start docker?
October 21, 20214 yr Community Expert If the pool is redundant you can remove one cache device and let the pool balance, then add the other one, you just can't do a direct replacement.
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