On Wed, 7 Jun 2000, Dennis DeDonatis wrote:
> After these errors, I placed a DLT drive on the end of the SCSI
> cable and it worked fine on the Linux computer, then I took THIS
> drive and cable to a computer running NT 4.0 SP5 (and using an
> Adaptec 2930) and it worked. We backed up and restored data
> just fine.
>
> We used the same media in all cases.
>
> Since you are the person that ported the driver to Linux, I'll assume
> you are saying that there most likely is NOT a problem with the
> driver. :)
Ported in december 1995. But since this date I have mostly been the only
guy that actually worked on SYM53C8XX drivers for Free O/Ses and
developped real new features. By the way, FreeBSD people are quite happy
with the `sym' driver that made vanished all problems encountered with the
`ncr' and added numerous features for SYM53C8XX support.
> Thanks for your help. Do you have any other suggestions?
Unfortunately nothing very precise. :(
But if placing the device at a different place on the cable get rid of the
problem then reason is to be looked for in the hardware, in my opinion.
G�rard.
> Dennis
>
>
> >
> >
> > On Wed, 7 Jun 2000, Dennis DeDonatis wrote:
> >
> > > If I:
> > >
> > > mt -f /dev/nst0 retension
> > >
> > > I get:
> > >
> > > sym53c876-1: unexpected disconnect
> > > sym53c876-1-<2,0>: COMMAND FAILED (8a ff) @df689000.
> > > sym53c876-1: unexpected disconnect
> > > sym53c876-1-<2,0>: COMMAND FAILED (8a ff) @df689000.
> > > scsi1 channel 0 : resetting for second half of retries.
> > > SCSI bus is being reset for host 1 channel 0.
> > > sym53c8xx_reset: pid=9956 reset_flags=1 serial_number=0
>serial_number_at_timeout=0
> > > scsi1: device driver called scsi_done() for a syncronous reset.
> > > sym53c876-1: restart (scsi reset).
> > > sym53c876-1: Downloading SCSI SCRIPTS.
> > > sym53c876-1: unexpected disconnect
> > > sym53c876-1-<2,0>: COMMAND FAILED (8a ff) @df689000.
> > > sym53c876-1: unexpected disconnect
> > > sym53c876-1-<2,0>: COMMAND FAILED (8a ff) @df689000.
> > > sym53c876-1: unexpected disconnect
> > > sym53c876-1-<2,0>: COMMAND FAILED (8a ff) @df689000.
> > > st0: Error 2707007f (sugg. bt 0x20, driver bt 0x27, host bt 0x7).
> >
> > The device disconnected from the SCSI BUS when the host was not expecting
> > it to do so (while a SCSI transaction was in progress). This is the usual
> > and recommended way for a SCSI device to report severe errors that cannot,
> > for some reason, be reported by the normal SCSI error reporting protocol
> > (status CHECK CONDITION followed by a REQUEST SENSE command).
> >
> > As a result, there is no means to know about the reason of the problem,
> > since no information about the error is transmitted to the host by the
> > device. :(
> >
> > > Here are the startup messages:
> > >
> > > scsi : 0 hosts.
> > > scsi : detected total.
> > > md.c: sizeof(mdp_super_t) = 4096
> > > Partition check:
> > > RAMDISK: Compressed image found at block 0
> > > autodetecting RAID arrays
> > > autorun ...
> > > .. autorun DONE.
> > > VFS: Mounted root (ext2 filesystem).
> > > sym53c8xx: at PCI bus 0, device 6, function 0
> > > sym53c8xx: 53c876 detected
> > > sym53c8xx: at PCI bus 0, device 6, function 1
> > > sym53c8xx: 53c876 detected
> > > sym53c876-0: rev=0x14, base=0xc6ffcf00, io_port=0x2000, irq=5
> > > sym53c876-0: ID 7, Fast-20, Parity Checking
> > > sym53c876-0: on-chip RAM at 0xc6fff000
> > > sym53c876-0: restart (scsi reset).
> > > sym53c876-0: Downloading SCSI SCRIPTS.
> > > sym53c876-1: rev=0x14, base=0xc6ffce00, io_port=0x2400, irq=10
> > > sym53c876-1: ID 7, Fast-20, Parity Checking
> > > sym53c876-1: on-chip RAM at 0xc6ffe000
> > > sym53c876-1: restart (scsi reset).
> > > sym53c876-1: Downloading SCSI SCRIPTS.
> > > scsi0 : sym53c8xx - version 1.3g
> > > scsi1 : sym53c8xx - version 1.3g
> > > scsi : 2 hosts.
> > > Vendor: COMPAQ Model: BD009122C6 Rev: B016
> > > Type: Direct-Access ANSI SCSI revision: 02
> > > Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
> > > sym53c876-0-<0,0>: tagged command queue depth set to 8
> > > Vendor: ARCHIVE Model: Python 28388-XXX Rev: 4.28
> > > Type: Sequential-Access ANSI SCSI revision: 02
> > > sym53c876-0-<0,*>: FAST-20 WIDE SCSI 40.0 MB/s (50 ns, offset 16)
> > > SCSI device sda: hdwr sector= 512 bytes. Sectors= 17773524 [8678 MB] [8.7 GB]
> > > sda: sda1 < sda5 sda6 sda7 sda8 sda9 sda10 > sda3
> > > autodetecting RAID arrays
> > > autorun ...
> > > .. autorun DONE.
> > > VFS: Mounted root (ext2 filesystem) readonly.
> > >
> > > Can anyone help me figure out what is wrong? What other
> > > information do you need? I am running RedHat v6.1 with kernel
> > > 2.2.14-12.
> >
> > May-be the drive has mechanical problems or encountered a problem with the
> > media.
> >
> > G�rard.
> >
> >
>
>
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