Recently my Airport Time capsule reported that my drive is bad and i stopped
seeing it.
I opened the airport and removed the drive.
Attaching drive to linux did not help. In bios it was partly recognised as 6gb drive.
Under operating system linux does not see it too.
After the drive is spinning i am hearing 3-4 clicking sounds which may be not so good.
I attached serial port and this is what i see:

----
Boot 0x40M

Spin Up
FAIL Servo Op=0100 Resp=0007
0100 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
ResponseFrame 1980 004E 03B4 4300 0008 0000 0000 0000 0D7B 0000 0000 0000 0000 0000 0000 0000 4202 2BF9 FFFF 2000 20DC 0000 0000 4155 0000 4155 0000 2247 0000 0020 001A 0007 0010
FAIL Servo Op=0100 Resp=0003
0100 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
ResponseFrame 2080 004F 03B4 4300 0008 0000 0000 0000 0D7B 0000 0000 0000 0000 0000 0000 0000 4202 2BF9 FFFF 2000 20DC 0000 0000 4155 0000 4155 0000 007F 0004 0020 001A 0004 0000.

-----

Disk is encrypted from the airport.
Anyone knows what could be the problem ?
I hope it's not broken head or something even more bad.
Any help is appreciated.

DM series... Fail servo ... I'm afraid it is and or media damage

Pretty much

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

Yup...likely heads and media damage.

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Luke
Recovery Force Data Recovery

You need to find a compatible model to replace the head

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I am from cuudulieuocung.org and I am currently banned from this forum for creating multiple accounts to promote my crappy website.

Once you get the drive recovered (if possible) or give up trying...

You may be entitled to reimbursement under consumer laws because you have a Seagate "DM" series 3TB drive (which fails much more often than a drive should). If you'd like more information, check out this link about the pending lawsuit against Seagate:
https://www.hbsslaw.com/cases/seagate

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$300 Data Recovery - Los Angeles Data Recovery

Can anyone with affected drives who live outside the U.S. do anything about this?

I will try head swap and now searching for the same model.
I will post my advance when i find good donor.