Date: Tue, 3 Mar 2015 15:50:41 +0800 From: fengyd <fengyd81@gmail.com> To: "Kenneth D. Merry" <ken@freebsd.org> Cc: freebsd-scsi@freebsd.org Subject: Re: What does the error code 82 mean? Message-ID: <CACnvu8big5_XuMCgcEtLA=4b625os_86ROcsAhJPOQ24TfUUDw@mail.gmail.com> In-Reply-To: <20150303065052.GA98687@mithlond.kdm.org> References: <CACnvu8aooXfqV3sG_VbispuZQRVs=g3zVU=GUrqB1QN5g2x6Mg@mail.gmail.com> <CACnvu8YVapcG50oBFSjd1731N-8G7zdybjN2CN6mpgzdrXrifQ@mail.gmail.com> <CACnvu8aNsL5e1=Ygu2wXP=-t1Z-LSWp1GQFrPwruB9PHBkNVXw@mail.gmail.com> <20150303065052.GA98687@mithlond.kdm.org>
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Hi,
Thanks very much for your reply.
-How are you sending the INQUIRY command?
Yes.
-Are you sending it via the pass(4) driver?
Yes
-How many bytes are you asking for in the CDB?
64
-How many bytes are you setting in the dxfer_len field in the CCB?
64, but it seems the device wants to transfer 128 bytes.
-What kind of device are you talking to?
Some kernel log:
da3 at sym1 bus 0 target 0 lun 0
da3: <FUJITSU MBA3073NP 4702> Fixed Direct Access SCSI-3 device
da3: 40.000MB/s transfers (20.000MHz, offset 31, 16bit), Tagged Queueing
Enabled
da3: 70136MB (143638992 512 byte sectors: 255H 63S/T 8941C)
[image: Inline image 2]
The brief connections as above:
UNIT0 can access DISK0 and DISK1 by IOC0.
UNIT1 can access DISK0 and DISK1 by IOC1.
The problem happens when UNIT0 sends XPT_RESET_DEV to reset one disk, UNIT1
sends INQUIRY to get the basic information from the target, but fails to
get the correct information.
And I added some log.
The right information got from device:
00 00 03 12 5B 00 01 3A 46 55 4A 49 54 53 55 20
4D 42 41 33 30 37 33 4E 50 20 20 20 20 20 20 20
34 37 30 32 42 42 53 32 50 41 41 30 31 31 46 34
00 00 00 00 00 00 00 00 0F 00 00 40 0B 54 01 3C
The wrong information got from device:
00 00 00 00 03 00 12 00 5B 00 00 00 01 00 3A 00
46 00 55 00 4A 00 49 00 54 00 53 00 55 00 20 00
4D 00 42 00 41 00 33 00 30 00 37 00 33 00 4E 00
50 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00
Compared to the right log, it seems one extra byte *00* is added after
every byte.
Thanks for your help.
Br.
Yafeng
On Tue, Mar 3, 2015 at 2:50 PM, Kenneth D. Merry <ken@freebsd.org> wrote:
>
> An overrun is exactly what the comment below indicates. It is when the
> target sends back more data than you asked for. You will generally see it
> on commands that receive data from a target.
>
> How are you sending the INQUIRY command? Are you sending it via the
> pass(4) driver? How many bytes are you asking for in the CDB? How many
> bytes are you setting in the dxfer_len field in the CCB?
>
> What kind of device are you talking to? Obviously, you're using the sym(4)
> driver, so I'm guessing this is a parallel SCSI device (unless there is a
> virtualization stack that emulates the sym(4) hardware).
>
> Ken
>
> On Mon, Mar 02, 2015 at 15:49:57 +0800, fengyd wrote:
> > Hi,
> >
> > I found the related code in the function sym_int_sir:
> > /*
> > * The device wants us to tranfer more data than
> > * expected or in the wrong direction.
> > * The number of extra bytes is in scratcha.
> > * It is a data overrun condition.
> > */
> > case *SIR_DATA_OVERRUN*:
> > if (cp) {
> > OUTONB (HF_PRT, HF_EXT_ERR);
> > * cp->xerr_status |= XE_EXTRA_DATA;*
> > cp->extra_bytes += INL (nc_scratcha);
> > }
> > goto out;
> >
> > I'm not familiar with SCSI.
> > What does DATA_OVERRUN actually mean?
> > How can it be triggered?
> > Could you give more details about it?
> >
> > Thanks for your help.
> >
> > Br.
> > Yafeng
> >
> >
> >
> > On Sat, Feb 28, 2015 at 4:50 PM, fengyd <fengyd81@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > It seems the error code 82 & 3F is 0x12.
> > > And the definition of the error code in the file cam.h:
> > > CAM_AUTOSENSE_FAIL = 0x10,/* Autosense: request sense cmd fail
> */
> > > CAM_NO_HBA, /* No HBA Detected error */
> > > CAM_DATA_RUN_ERR, /* Data Overrun error */
> > >
> > > So, it means data overrun error?
> > >
> > > Thanks.
> > >
> > > Br.
> > > Yafeng
> > >
> > > On Sat, Feb 28, 2015 at 4:32 PM, fengyd <fengyd81@gmail.com> wrote:
> > >
> > >> Hi,
> > >>
> > >> INQUIRY command is sent to the target, but error code 82 is returned.
> > >> I added some log in the driver:
> > >> SIR_COMPLETE_ERROR
> > >> (pass0:sym0:0:0:0): sym_complete_error status = 18
> > >> (pass0:sym0:0:0:0): status = 82
> > >>
> > >> Do you know what does the error code 82 mean?
> > >>
> > >> Thanks in advance.
> > >>
> > >> Br.
> > >> Yafeng
> > >>
> > >
> > >
> > _______________________________________________
> > freebsd-scsi@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-scsi
> > To unsubscribe, send any mail to "freebsd-scsi-unsubscribe@freebsd.org"
>
> --
> Kenneth Merry
> ken@FreeBSD.ORG
>
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