Spin Retry Count eSATA H/W RAID5 (Mediasonic HFR2-SU3S2)

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Spin Retry Count eSATA H/W RAID5 (Mediasonic HFR2-SU3S2)

Postby Hard_Disk_Howie » 2022.06.03. 20:24


I'm trying to better understand/diagnose significant number of Spin Retry Count entries in the Log for all 4 drives in this enclosure:

Mediasonic HFR2-SU3S2 PRORAID external enclosure
eSATA connection
Currently via on-board Asmedia 106x SATA Controller (AHCI) [VEN: 1B21, DEV: 0612] Version:, 6-24-2020
(previously mostly connected via SYBA / IOCrest SD-SA2PEX-2E PCIe SATA card with Marvell controller )


4 x Hitachi Deskstar 3TB drives model HDS723030ALA640
In RAID5 configuration

  • Enclosure and drives purchased and put into service in July 2011.
  • Configured for RAID5 from the start, and never changed.
  • The enclosure has been pretty rock solid and reliable for 11 years, used until recently with Windows 7 (now Windows 10.)
  • HD Sentinel first installed July 2020

Prior to purchasing and using Hard Disk Sentinel, I did not know much about the health or status of the hard drives. Initially, I mostly used HD Sentinel to monitor drive temperatures (which led me to add additional external fan for cooling.) But over time, I've noticed the HDS Log indicating a fair number of Spin Retry entries for all four drives, beginning shortly after I installed the software. The enclosure has been attached much, but not 100% of the time the computer is used.

Since the spin retry issue is logged for all drives, I'm guessing it's more likely due to power supply issue, but also wondering whether perhaps this particular enclosure's "normal operation" might function in a way that reports a problem in HD Sentinel that might not actually be a problem? I Could Not Find much specific to this enclosure and this particular issue here in the forum or online in general, so I'm hoping to get some feedback.

I will use the "send test report to developer" option as well.

Mediasonic PRO RAID HD Sentinel spin retry log screenshots 1.png
Mediasonic PRO RAID HD Sentinel spin retry log screenshots 1.png (207.43 KiB) Viewed 180 times
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Re: Spin Retry Count eSATA H/W RAID5 (Mediasonic HFR2-SU3S2)

Postby hdsentinel » 2022.06.07. 11:13


Thanks for your message and the information - and increasing attention to such interesting case.

Yes, generally Hard Disk Sentinel (as we expect) detects and reports the changes in the status, so reports if the Spin retry count attribute changes with time.

I completely agree that it is more than interesting that such issues happening at the same time for all drives. Yes, first I'd surely think about the power supply: a 11 year power supply (assuming that it is as old as the enclosure itself) may not able to provide enough power to spin up all drives at the same time (especially 7200 RPM drives).
Not sure, but if possible, I recommend to please try with a different power supply/adapter (just may be hard because of the special plug) to verify if things are better, more stable.

Personally I'd also try to disable hard disk spin down at power management settings to prevent frequent spin up / spin down cycles.

Maybe if you see that the Spin retry count attribute changes for one or more hard disk drives, please send a new developer report: then it is possible to compare with the current situation.
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