Re: Adaptec AHD U320 operating as only U160

On Feb 17, 2008 3:52 PM, Justin T. Gibbs <gibbs_at_scsiguy.com> wrote:
> Niki Denev wrote:
> > After some bonnie64 runs the first machine (8.0-CURRENT Dtrace
> > snapshot with aic79xx_osm.c v1.30) spat out this :
> >
> > ahd1: Recovery Initiated - Card was not paused
> >>>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<
> > ahd1: Dumping Card State at program address 0x38 Mode 0x11
>
> ...
>
> > SAVED_MODE[0x11] DFFSTAT[0x31]:(CURRFIFO_1|FIFO0FREE|FIFO1FREE)
> > SCSISIGI[0x0]:(P_DATAOUT) SCSIPHASE[0x0] SCSIBUS[0x0]
> > LASTPHASE[0x1]:(P_DATAOUT|P_BUSFREE) SCSISEQ0[0x0]
>
> According to the controller, the bus is idle.  However...
>
> > Pending list:
> > 325 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > 403 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > 439 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > 380 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > 495 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > 353 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > 478 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x17]
> > Total 7
>
> we have 7 commands still pending on the drive at ID 1, and the drive hasn't
> provided status within the allowed timeout period.  There were lots of
> problems early on with Seagate drives locking up like this when hit with
> more than 31 (I think that was the magic number) concurrent commands with
> WCE (write cache enable) set.  It was supposedly fixed in later firmware
> releases.  Do you have the latest firmware for your drives?

No, they are with the default factory set firmware, probably years
old, i will try to upgrade them.

> You might be able to confirm this hypothesis by lowering the queued depth
> via camcontrol and/or disabling WCE.

I will definitely try this if I'm able to reproduce the error,
because I'm seeng probably Dtrace related panic on this machine, that
I'm trying to investigate.

> --
> Justin
>

  --Niki