Not sure, is this right site for this Q, but let me try

Last time i have problem with hard disk. Sometimes its do strange sound, and i get it from logs:

$dmesg | grep ata4

[29409.945516] ata4.00: exception Emask 0x10 SAct 0xf SErr 0x90202 action 0xe frozen

[29409.945529] ata4.00: irq_stat 0x00400000, PHY RDY changed

[29409.945538] ata4: SError: { RecovComm Persist PHYRdyChg 10B8B }

[29409.945546] ata4.00: failed command: READ FPDMA QUEUED

[29409.945562] ata4.00: cmd 60/30:00:56:22:5f/00:00:00:00:00/40 tag 0 ncq 24576 
in
[29409.945573] ata4.00: status: { DRDY }

[29409.945580] ata4.00: failed command: READ FPDMA QUEUED

[29409.945594] ata4.00: cmd 60/18:08:8e:22:5f/00:00:00:00:00/40 tag 1 ncq 12288 
in
[29409.945605] ata4.00: status: { DRDY }

[29409.945611] ata4.00: failed command: READ FPDMA QUEUED

[29409.945625] ata4.00: cmd 60/08:10:46:02:66/00:00:00:00:00/40 tag 2 ncq 4096 
in
[29409.945635] ata4.00: status: { DRDY }

[29409.945641] ata4.00: failed command: READ FPDMA QUEUED

[29409.945656] ata4.00: cmd 60/80:18:ee:04:66/00:00:00:00:00/40 tag 3 ncq 65536 
in
[29409.945666] ata4.00: status: { DRDY }

[29409.945679] ata4: hard resetting link

[29413.976083] ata4: softreset failed (device not ready)

[29413.976097] ata4: applying SB600 PMP SRST workaround and retrying

[29414.148070] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

[29414.184986] ata4.00: SB600 AHCI: limiting to 255 sectors per cmd

[29414.243280] ata4.00: SB600 AHCI: limiting to 255 sectors per cmd

[29414.243292] ata4.00: configured for UDMA/133

[29414.243324] ata4: EH complete

[680674.804563] ata4: exception Emask 0x50 SAct 0x0 SErr 0x90a02 action 0xe 
frozen
[680674.804575] ata4: irq_stat 0x00400000, PHY RDY changed

[680674.804584] ata4: SError: { RecovComm Persist HostInt PHYRdyChg 10B8B }

[680674.804603] ata4: hard resetting link

[680678.840561] ata4: softreset failed (device not ready)

Is this ata4 sata hard drive dead? Must i change it ASAP ? Need I specify more info?