Hello,
here is my the message a sent to the net:
> Hi,
>
> I have add a Quantum 2 Gb disk on my system just modifying the /etc/disktab.
> I have add a new entry (rzq):
>
> # cat /etc/disktab
> ...
> rzq|RZQ|Quantum Empire_2100S:\
> :ty=QUA 2100S:dt=SCSI:ns#137:nt#12:nc#2499:\
> :oa#0:pa#131072:ba#8192:fa#1024:\
> :ob#0:pb#0:bb#8192:fb#1024:\
> :oc#0:pc#4108356:bc#8192:fc#1024:\
> :od#0:pd#0:bd#8192:fd#1024:\
> :oe#0:pe#0:be#8192:fe#1024:\
> :of#0:pf#0:bf#8192:ff#1024:\
> :og#0:pg#0:bg#8192:fg#1024:\
> :oh#0:ph#0:bh#8192:fh#1024:
>
> The command "disklabel -rw /dev/rrz2c rzq" works. ADVfs commands too.
> My questions are the following:
> 1) do I need to modify the /sys/data/cam_data.c file?
> 2) why ?
>
> Thanks in advance.
> ***
> Christophe DIARRA
> Institut de Physique Nucleaire
> Orsay - Bat 100 - S2I
> 91406 Orsay - FRANCE
> E-mail: diarra_at_ipnsun5.in2p3.fr
> ***
I have received a lot of good responses, and any thing is clear now for me.
Many thanks to Knut Helleboe, Daniel Clar, Thomas P. Blinn, pclark, alan_at_nabeth.cxo.dec.com.
I can summary things as bellow:
To add an SCSI disk which is SCSI-2 compliant, just type the following command:
# disklabel -wr rz# anything_here
Example:
# disklabel -wr rz2 rz2
You don't need to modify /etc/disktab or /sys/data/cam_data.c
You may modify files only when you add RAID systems.
The detail of the answers are here-included:
> From bgk1142_at_bggfu2.nho.hydro.com Mon Jul 10 12:02:10 1995
> Reply-To: Knut.Hellebo_at_nho.hydro.com
> X-Mailer: Z-Mail (3.2.0 26oct94 MediaMail)
> To: diarra_at_ipnsun5.in2p3.fr (Christophe Diarra)
> Subject: Re: what is zko.dec.com ?
> Mime-Version: 1.0
> Content-Type: text/plain; charset=us-ascii
> Content-Transfer-Encoding: 8bit
> Content-Length: 847
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>
> Regards,
>
> 1. No, because the interface to the disk is through the standard SCSI
> interface already described.
>
> --
>
> ******************************************************************
> * Knut Helleboe | DAMN GOOD COFFEE !! *
> * Norsk Hydro a.s | (and hot too) *
> * Phone: +47 55 996870, Fax: +47 55 996342 | *
> * Pager: +47 96 500718 | *
> * E-mail: Knut.Hellebo_at_nho.hydro.com | Dale Cooper, FBI *
> ******************************************************************
> From Daniel.Clar_at_supelec.fr Mon Jul 10 13:29:40 1995
> To: diarra_at_ipnsun5.in2p3.fr
> Subject: Re: Adding Third-Party SCSI Disk
> X-Vms-To: SMTP%"diarra_at_ipnsun5.in2p3.fr"
> Content-Length: 105
> X-Lines: 5
>
> Je ne sais plus trop, mais quelque chose du genre :
>
> disklabel -t advfs -r /dev/rrzxx atlas
>
> Daniel Clar
>
> From tpb_at_zk3.dec.com Mon Jul 10 15:45:33 1995
> To: diarra_at_ipnsun5.in2p3.fr (Christophe Diarra)
> Subject: Re: Adding Third-Party SCSI Disk
> X-Mts: smtp
> Content-Length: 1140
> X-Lines: 33
>
>
> > I have add a Quantum 2 Gb disk on my system just modifying the /etc/disktab.
>
> Good for you. In fact, you shouldn't even need to modify /etc/disktab if
> you are using the latest software releases.
>
> > The command "disklabel -rw /dev/rrz2c rzq" works. ADVfs commands too.
>
> They are all supposed to work with any quality SCSI-2 compliant hard disk.
>
> > My questions are the following:
> > 1) do I need to modify the /sys/data/cam_data.c file?
> > 2) why ?
>
> 1) No.
>
> 2) You don't need to.
>
> Tom
>
> Dr. Thomas P. Blinn, UNIX Software Group, Digital Equipment Corporation
> 110 Spit Brook Road, MS ZKO3-2/U20 Nashua, New Hampshire 03062-2698
> Technology Partnership Engineering Phone: (603) 881-0646
> Internet: tpb_at_zk3.dec.com Digital's Easynet: alpha::tpb
>
> Worry kills more people than work because more people worry than work.
>
> My favorite palindrome is: Satan, oscillate my metallic sonatas.
> -- Phil Agre, pagre_at_ucsd.edu
>
> Opinions expressed herein are my own, and do not necessarily represent
> those of my employer or anyone else, living or dead, real or imagined.
>
>
I include bellow just two messages to summary all the responses:
> From pclark_at_pclark.pcix.com Mon Jul 10 16:42:50 1995
> Subject: Re: Adding Third-Party SCSI Disk
> To: diarra_at_ipnsun5.in2p3.fr
> X-Mailer: ELM [version 2.4 PL24]
> Mime-Version: 1.0
> Content-Type> : > text/plain> ; > charset=US-ASCII>
> Content-Transfer-Encoding: 7bit
> Content-Length: 224
> X-Lines: 6
>
> Actually, you don't need to edit either disktab or cam_data. If you
> disklabel'd the drive with an unassigned number (i.e. rz99) disklabel
> goes out and gets all the information it needs from the drive itself.
>
> Good luck!
>
>
> From alan_at_nabeth.cxo.dec.com Mon Jul 10 17:17:59 1995
> To: diarra_at_ipnsun5.in2p3.fr
> Subject: Re: Adding Third-Party SCSI Disk
> Content-Length: 575
> X-Lines: 12
>
> If a SCSI devices requires the setting of options beyond
> the default to work reasonably, then an entry in the cam_data.c
> file is useful. Typical examples are tape drives that need
> their write-cache turned on to provide the expected level of
> performance. Disks typically don't require such options, so
> the only value of a cam_data.c entry is to allow the system
> to "recognize" the disk as its actual type rather than RZxx.
>
> For RAID subsystems an entry might be useful, since it allows
> adding some of the SCSI options that aren't typically negoicated
> by default.
>
>
Received on Mon Jul 10 1995 - 19:07:49 NZST