January 11, 20251 yr I have had an issue twice now, where when I just select shutdown in Unraid 7, the server gives the error below and sits retrying and when i eventually restart the server, I have a drive with the red x error. First time I replaced the drive, second time it had happened to the exact same slot. The drives are attached via a LSI 9300 16i HBA to a SAS 3 expander backplane on a CSE 846 chassis (chassis is new to me, got it a couple of weeks ago). So with the error below, could I possibly have a bad backplane on the new chasis or is it simply a cable issue? (The chassis came with the cables already attached to the backplane) I contacted the eBay seller but I really don't want to have ship the chassis back with all that entails. This is the error I see: XFS (md5p1): Failing async write on buffer block 0x1. Retrying async write Thoughts?
January 11, 20251 yr Author Here are the diagnostics from the server: unraid-diagnostics-20250110-1737.zip Edited January 11, 20251 yr by crowdx42
January 11, 20251 yr Community Expert 9 hours ago, crowdx42 said: LSI 9300 16i HBA to a SAS 3 expander backplane on a CSE 846 chassis (chassis is new to me, got it a couple of weeks ago). There appears to be cables from the HBA to two different expanders, that is not supported, make sure you only connect one or two cables from the HBA to the same expander in the backplane, then post new diags.
January 11, 20251 yr Author Ok, so there is a single SAS3 expander backplane on the chassis. I have a single 9300 16i HBA connected using 4 cables from the HBA to 4 connections on the backplane. Edited January 11, 20251 yr by crowdx42
January 11, 20251 yr Community Expert 45 minutes ago, crowdx42 said: Ok Is this a change you made since last diagnostics?
January 11, 20251 yr Author Nope, this has been the setup that I have had the issue with, no changes have been made. The backplane has a SAS3 expander which has 4 ports on it, those 4 ports are connected back to the 9300 16i HBA.
January 12, 20251 yr Community Expert 17 hours ago, crowdx42 said: I have a single 9300 16i HBA connected using 4 cables from the HBA to 4 connections on the backplane. You can only use two cables max for dual link, or one for a single link.
January 12, 20251 yr Author Would connecting all 4 cables from the expander cause the issue I am seeing? When I swap out the current 9300 for a 9500, it will have a single 𝐒𝐅𝐅-𝟖𝟔𝟓𝟒 connector to two 𝐒𝐅𝐅-𝟖𝟔𝟒𝟑 on the expander backplane. Is the 4 𝐒𝐅𝐅-𝟖𝟔𝟒𝟑 on the backplane designed for the connection of two HBAs? The chassis came with all 4 cables connected to the expander and so I connected all 4 cables to the HBA.
January 13, 20251 yr Community Expert 15 hours ago, crowdx42 said: Would connecting all 4 cables from the expander cause the issue I am seeing? Probably. 15 hours ago, crowdx42 said: Is the 4 𝐒𝐅𝐅-𝟖𝟔𝟒𝟑 on the backplane designed for the connection of two HBAs? Yes, for redundancy, but Unraid doesn't support multipath, you can only have one controller connected to one expander.
January 14, 20251 yr Author Just to update, I pulled all the current drives, added 4 drives that I don't use and then also replaced the HBA with a 9500 and also changed the cables. Plugged in a different USB drive with a test license I have and then booted, did a new config. I then did a restart and a sleep and restart and got the same issue. I contacted the eBay seller and they are sending out a replacement backplane expander.
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