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from what i understand somethings is wrong with hdd i am trying to find some commands in order to run some tests to check if hard disk is OK

I will post a full list of logs after REBOOT of system:

"Unknown problem somewhere in the system."
kernel: ata2.00: failed command: READ FPDMA QUEUED
kernel:         res 51/40:c8:38:5c:16/00:00:00:00:00/40 Emask 0x409 (media error) <F>
kernel: ata2.00: error: { UNC }
kernel: ata2.00: failed command: READ FPDMA QUEUED
kernel:         res 51/40:78:88:5c:16/00:00:00:00:00/40 Emask 0x409 (media error) <F>
kernel: sd 1:0:0:0: [sda]  Sense Key : Medium Error [current] [descriptor]
kernel: sd 1:0:0:0: [sda]  Add. Sense: Unrecovered read error - auto reallocate failed
kernel: md/raid1:md1: read error corrected (8 sectors at 1461400 on sda1)
kernel: sd 1:0:0:0: [sda]  Add. Sense: Unrecovered read error - auto reallocate failed
kernel: sd 1:0:0:0: [sda]  Add. Sense: Unrecovered read error - auto reallocate failed
kernel: md/raid1:md1: read error corrected (8 sectors at 1461672 on sda1)

Also some of this logs are duplicate or even more.

Thanks.

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