Request for testing: ata(4) MFC

Steven Hartland killing at
Fri Oct 17 09:07:11 UTC 2008

Highly likely, as it was seagate disks I had this issue with. The comment
in the hptmv driver:-
+   /*
+    * always use 48bit LBA if drive supports it.
+    * Some Seagate drives report error if you use a 28-bit command
+    * to access sector 0xfffffff.
+    */

----- Original Message ----- 
From: "Ruben van Staveren" <ruben at>

> You must be very careful with using less than 48bit addressing when  
> both
> the drive and the controller supports it as some disks report errors  
> at
> none standard crossover points.
> I saw this first hand with the highpoint driver where it totally  
> trashed
> the RAID volumes. The solution was to "always" use 48bit addressing if
> the drive supports / requires it.

Could this be the thing that is at stake ?

The mirror, consisting out of ad4/ad6 got its ad4 trashed with the  
patch enabled. luckily it could be rebuild from the intact ad6.

here is a atacontrol cap ad4

(0|chassis|ttyp0[-]) ~ > atacontrol cap ad4

Protocol              Serial ATA II
device model          SEAGATE ST32500NSSUN250G 0825B824R1
serial number         9QE824R1
firmware revision     3AZQ
cylinders             16383
heads                 16
sectors/track         63
lba supported         268435455 sectors
lba48 supported       488390625 sectors
dma supported
overlap not supported

Feature                      Support  Enable    Value           Vendor
write cache                    yes yes
read ahead                     yes yes
Native Command Queuing (NCQ)   yes  - 31/0x1F
Tagged Command Queuing (TCQ)   no no 31/0x1F
SMART                          yes yes
microcode download             yes yes
security                       yes no
power management               yes yes
advanced power management      no no 65278/0xFEFE
automatic acoustic management  no no 0/0x00 254/0xFE

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