das IO errors

[rukiftw]

Seasons Greetings Community Wizards,

I am in need of your expertise.

 

I woke up this morning to two drives disabled. Party2 and data 2. I replaced them with cold spares.

I made a new config with out the bad drives. 

I went to preclear the replacements, but both drives did not show up. So i checked the disk log.

 

The replacements and several others are reporting:

Nov 30 08:36:00 nas kernel: print_req_error: I/O error, dev sdv, sector XX

 

The replacements are spamming this message. the others only have one entry.

 

My DAS is an: EMC2 KTN-STL3. 

I guess my two options are:

• replace the interposers which are sending out read errors
• replace the sas controller

 

my primary concern is the prevention of data loss.

my primary party drive is still valid, and not reporting errors.

 

after we figure this out, i assume the rebuild goes as follows:

1.) restore data drive.

2.) restore parity2.

?

 

Any support is appreciated,

Thank you!

tctnas-diagnostics-20191130-1657.zip

Edited November 30, 2019 by rukiftw

[rukiftw]

Update1: 

I blew out the das, swapped the sas controllers, replaced the 8088 cable.

only five minutes in, but no more read errors on anything!!!!

 

w00t w00t. Probally the 8088 cable.

Am i able to create a new config and add the previous drives back in?

Edited November 30, 2019 by rukiftw

[rukiftw]

7 hours later. no further errors.

I added both the parity and data drives back into the new config.

a rebuild is required. 

 

I hope this information helps someone else in the future.

[bounsky]

.

What  SAS HBA card are you using on the Unraid server to connect to the KTN-STL3?