HP microserver gen8, ESXI, disk problem?

Question

Hard disks

Hello colleagues, tell me who has come across, ESXI 6.5 is deployed on HP Microserver gen8 for some time I receive notifications:
blk_update_request: critical target error, dev sda sector XXX
. The disks work in RAID 1+0 under an HP b120i controller. Status monitoring on the server itself says that the disks are OK.
Tell me where to dig. There is an idea to stop the server and drive the SMART status on each of the disks one by one.

Answer 1

First of all, make a copy of all important data on the server and make sure that they are not damaged in the copy.

deployed ESXI 6.5 ... Drives running in RAID 1+0 under HP b120i controller

ESXI and the RAID controller are really two "layers" that can interfere with direct interaction with disks. At a minimum, with a raid controller, you need to study how it works, what its drivers allow, and what software is available.
If you can't get into the native OS, then number the disks, disassemble the array, and connect the disks directly to the Windows computer. Windows has long become the industry standard in data recovery, and all the most interesting software is developed for it, regardless of what drives are being worked with. If it prompts you to initialize/format disks, or starts a check, refuse/stop.
Download and unpack R.tester: https://rlab.ru/tools/rtester.html
In it, you can both view SMART and make the most detailed reading tests that will show the state of the surface.
You can also do write tests, but they destroy everything irrevocably, so you have to prepare first (back up data or make disk images).

Answer 2

As a result:
I pulled out an old disk that worked for 40 thousand hours, the condition of which is generally not bad, there are no bad sectors, smart passes.
For a week, esxi worked on 1 disk and the problem did not occur all week, I inserted the second one, redild went away and on the second day a similar error appeared.