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Date:      Tue, 13 Mar 2001 09:03:29 +0700 (ICT)
From:      Olivier Nicole <on@cs.ait.ac.th>
To:        groudier@club-internet.fr
Cc:        gemorga2@vt.edu, mjacob@feral.com, freebsd-scsi@FreeBSD.ORG
Subject:   Re: SCSI speed with SLR100 tape drive
Message-ID:  <200103130203.JAA11318@banyan.cs.ait.ac.th>
In-Reply-To: <Pine.LNX.4.10.10103121837550.1687-100000@linux.local> (message from =?ISO-8859-1?Q?G=E9rard_Roudier?= on Mon, 12 Mar 2001 18:52:08 %2B0100 (CET))
References:   <Pine.LNX.4.10.10103121837550.1687-100000@linux.local>

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Gerard,

>Could you please, post _all_ the messages printed out by the sym driver?

I hope that's what you mean:

sym0: <896> port 0xb800-0xb8ff mem 0xfa000000-0xfa001fff,0xfa800000-0xfa8003ff i
rq 10 at device 5.0 on pci1
sym0: Symbios NVRAM, ID 7, Fast-40, LVD, parity checking
sym0: open drain IRQ line driver, using on-chip SRAM
sym0: using LOAD/STORE-based firmware.
sym0: handling phase mismatch from SCRIPTS.
sym1: <896> port 0xb400-0xb4ff mem 0xf9000000-0xf9001fff,0xf9800000-0xf98003ff i
rq 11 at device 5.1 on pci1
sym1: Symbios NVRAM, ID 7, Fast-40, LVD, parity checking
sym1: open drain IRQ line driver, using on-chip SRAM
sym1: using LOAD/STORE-based firmware.
sym1: handling phase mismatch from SCRIPTS.
[...]
Waiting 15 seconds for SCSI devices to settle
(noperiph:sym0:0:-1:-1): SCSI BUS reset delivered.
(noperiph:sym1:0:-1:-1): SCSI BUS reset delivered.
sa0 at sym1 bus 0 target 2 lun 0
sa0: <TANDBERG SLR100 0402> Removable Sequential Access SCSI-2 device 
sa0: 40.000MB/s transfers (20.000MHz, offset 15, 16bit)
da0 at sym0 bus 0 target 0 lun 0
da0: <SEAGATE ST318436LW 0010> Fixed Direct Access SCSI-3 device 
da0: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da0: 17522MB (35885168 512 byte sectors: 255H 63S/T 2233C)
da4 at sym0 bus 0 target 4 lun 0
da4: <SEAGATE ST318436LW 0010> Fixed Direct Access SCSI-3 device 
da4: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da4: 17522MB (35885168 512 byte sectors: 255H 63S/T 2233C)
da3 at sym0 bus 0 target 3 lun 0
da3: <SEAGATE ST318436LW 0010> Fixed Direct Access SCSI-3 device 
da3: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da3: 17522MB (35885168 512 byte sectors: 255H 63S/T 2233C)
da2 at sym0 bus 0 target 2 lun 0
da2: <SEAGATE ST318436LW 0010> Fixed Direct Access SCSI-3 device 
da2: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da2: 17522MB (35885168 512 byte sectors: 255H 63S/T 2233C)
da1 at sym0 bus 0 target 1 lun 0
da1: <SEAGATE ST318436LW 0010> Fixed Direct Access SCSI-3 device 
da1: 80.000MB/s transfers (40.000MHz, offset 31, 16bit), Tagged Queueing Enabled
da1: 17522MB (35885168 512 byte sectors: 255H 63S/T 2233C)

Disk are on SCSI bus 0, tape alone on bus 1. It looks pretty much it
is LVD.

When using the Symbios Configuration Utility it says:

SCSI	       2
Identification TANDGBERGSLR100  0402
MB/sec	       80
MT/sec	       40
data width     16
scan ID	       yes
scan LUNs>0    yes
disconnect     on
timeout	       10
queue tags     on
boot choice    no

Above information are similar for disk and bus controler, except the
SCSI target and the identification string.

>May-be 40 MB/s burst is already enough to feed the tape fast enough to
>allow it to stream data.

It is actually, just I am trying to understand. In fact I got the
drive but there is a shortage of media... The wonders of living in far
East :)


Merci,

Olivier

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