Can Linux support both IDE and SCSI hard frives in the same system??

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Ben Scot » Sat, 10 May 1997 04:00:00




Quote:> Can a Linux system work with both IDE ans SCSI hard drives.? Please only
> answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

  Just to add another voice: Yes, it is quite possible.  If your boot drive is
the IDE drive, then you're all set.  Works like a charm.

  If you want to have an IDE drive present, but boot from SCSI, you may or may
not have problems.  Normally, a PC will not boot off a SCSI hard drive if IDE
drives are present.  Some motherboard BIOSes offer an option to configure
this.  If you don't have that, but only run Linux (and maybe Win95), you can
try clearing the BIOS drive types (Type=0/Not present).  Then the system will
boot off SCSI, and, when the kernel loads, it will detect the IDE controller
anyway and autoprobe the drives.  Win95 can do the same thing in some cases,
I'm told, but I've never tried it.  If you do try this method, then the IDE
drives won't be available until the Linux kernel (or Windows IDE driver) load,
and won't work under DOS at all.

  Hope this helps!

===========================================================================

DISCLAIMER: Everything I said in this message could have been a TOTAL LIE.
---------------------------------------------------------------------------

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Dan Geis » Sat, 10 May 1997 04:00:00



> Can a Linux system work with both IDE ans SCSI hard drives.? Please only
> answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

Yes. It's easy. Actually, I don't have it running right now, b/k the
SCSI drive I was using was an old one from a mac and it was making the
D/A converter on my CD-Rom screwy. It was running for a few months
ending last week, though.

Quote:

> Thus, has anyone succesfully done this?  Is it tricky?  How so?

No, not tricky. Recompile your kernel to support your SCSI card and SCSI
disks(and leave the default IDE support on), use fdisk or something else
to partition it. Make filesystems. Set it up in /etc/fstab. You're done.

Check out the kernel, SCSI, disk, and filesystem HOWTOs at www.linux.org
if you're not sure how to do these things.

--
Dan Geist

http://geist.gt.ed.net

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by George A. Puchalsk » Sat, 10 May 1997 04:00:00



> > Can a Linux system work with both IDE ans SCSI hard drives.?
> Please only
> > answser if you KNOW FOR SURE (i.e. you HAVE built one AND it
> works).

No problem whatso ever.  I have had Linux Running in a mixed IDE/SCSI
system since I got my first CD-Rom drive in '93.  I currently have a
pair of Quantuum Fireball 1.08 Gig IDE drives and an ancient HP 420 Meg
SCSI and a SCSI CD-ROM drive and everybody gets along great.

A buddy of mine has his Linux Root FS on an IDE and all others /usr etc.
on a SCSI drive.

Cheers,
  _GP_

George Puchalski      Software Developer    Bay Networks

www.baynetworks.com

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Larry Gorm » Sat, 10 May 1997 04:00:00


Can a Linux system work with both IDE ans SCSI hard drives.? Please only
answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

I know the theoritical answer is "it should."  One tech guy at Northwestern
University says the answer is NO - this based on the fact he could not do
it.  Several tech types here, who have built Linux machines with  SCSI
drives only say 'it *should* work.'

Thus, has anyone succesfully done this?  Is it tricky?  How so?

thanks in advance

Larry

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Mark Flac » Sat, 10 May 1997 04:00:00



> Can a Linux system work with both IDE ans SCSI hard drives.? Please only
> answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

Yup.

Quote:

> I know the theoritical answer is "it should."  One tech guy at Northwestern
> University says the answer is NO - this based on the fact he could not do
> it.  Several tech types here, who have built Linux machines with  SCSI
> drives only say 'it *should* work.'

> Thus, has anyone succesfully done this?  Is it tricky?  How so?

Yes. No.  Compile a kernel with both IDE and SCSI support in it.  Put the
SCSI card parameters in your LILO config file (or the command line of a
loadlin invocation).

My machine's got 1 IDE drive (with a Dynamic Drive Overlay bios remapping
to boot), and two SCSI drives.  The IDE and one SCSI are DOS format, the
other SCSI is pure Linux.  My linux (kernel 2.0.19) can see, read, and
write to them all.

Quote:

> thanks in advance

> Larry

--
\ ----------------------------------------------------------------------

\ "There's one in every crowd and it's usually me."       (972) 685-8347
\ Someday I may speak for Nortel.  Someday pigs may howl at a full moon.
\ Expect the latter to occur first.
 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Chris A. Eple » Sat, 10 May 1997 04:00:00


: Can a Linux system work with both IDE ans SCSI hard drives.? Please only
: answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

: I know the theoritical answer is "it should."  One tech guy at Northwestern
: University says the answer is NO - this based on the fact he could not do
: it.  Several tech types here, who have built Linux machines with  SCSI
: drives only say 'it *should* work.'

: Thus, has anyone succesfully done this?  Is it tricky?  How so?

Of course it works.  I've run with Linux on EIDE on the motherboard (Triton
I) and a Buslogic 946C with absolutely no problems.  It's not tricky.  The
only 'trick' might be if you want to boot off of SCSI and not the EIDE, to
do this I simply disabled the EIDE in BIOS and boot off of SCSI, use LOADLIN
to load the linux kernel which hapily detects the EIDE drives upon boot.  If
you have any questions, feel free to drop me some E-mail..

------------------------------------------------------------------------
Chris A. Epler - KC6ZOL - ESInet System Admin - (804) 974-7308
Do not send Unsolicited Commercial E-Mail (UCE), legal action may be taken.

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Michae » Sat, 10 May 1997 04:00:00



> Can a Linux system work with both IDE ans SCSI hard drives.? Please only
> answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

> Thus, has anyone succesfully done this?  Is it tricky?  How so?

> thanks in advance

Of course it will.  Just remember the IDE will be the boot disk
unless you have a nifty BIOS that allows otherwise...like mine has.

I am not currently running any IDE in this box but I have in the past.

--
Windows may be a fact of life but so is AIDS.

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Rich Carrei » Sat, 10 May 1997 04:00:00




>Can a Linux system work with both IDE ans SCSI hard drives.? Please only
>answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

The answer is yes, as I have a kernel (2.0.27) that is perfectly happy
dealing with two IDE hard drives, and IDE/ATAPI CD-ROM drive, and a
SCSI drive.
--
Rich Carreiro

UUCP: ...!mit.edu!rlcarr

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by Manuel J. Gal » Sun, 11 May 1997 04:00:00




Quote:

> Can a Linux system work with both IDE ans SCSI hard drives.? Please only
> answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

> I know the theoritical answer is "it should."  One tech guy at Northwestern
> University says the answer is NO - this based on the fact he could not do
> it.  Several tech types here, who have built Linux machines with  SCSI
> drives only say 'it *should* work.'

Yes it works. Indeed you need a supported SCSI host adapter.

My advice: avoid IDE if you use high speed serial/network cards.

--
Manuel J. Galan

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by david parso » Sun, 11 May 1997 04:00:00




>Can a Linux system work with both IDE ans SCSI hard drives.? Please only
>answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

   Yes.

                 ____

                  \/

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by ¥?¤é1ú1 » Tue, 13 May 1997 04:00:00


This is a cryptographically signed message in MIME format.

--------------ms6C7ABFCE8594648274D4179C
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit



> > Can a Linux system work with both IDE ans SCSI hard drives.? Please only
> > answser if you KNOW FOR SURE (i.e. you HAVE built one AND it works).

>   Just to add another voice: Yes, it is quite possible.  If your boot drive is
> the IDE drive, then you're all set.  Works like a charm.

>   If you want to have an IDE drive present, but boot from SCSI, you may or may
> not have problems.  Normally, a PC will not boot off a SCSI hard drive if IDE
> drives are present.  Some motherboard BIOSes offer an option to configure
> this.  If you don't have that, but only run Linux (and maybe Win95), you can
> try clearing the BIOS drive types (Type=0/Not present).  Then the system will
> boot off SCSI, and, when the kernel loads, it will detect the IDE controller
> anyway and autoprobe the drives.  Win95 can do the same thing in some cases,
> I'm told, but I've never tried it.  If you do try this method, then the IDE
> drives won't be available until the Linux kernel (or Windows IDE driver) load,
> and won't work under DOS at all.

>   Hope this helps!

> ===========================================================================

> DISCLAIMER: Everything I said in this message could have been a TOTAL LIE.
> ---------------------------------------------------------------------------

Absolutly YES, my Asus TP4XE with BIOS 301.3 which supports IDE/SCSI
select boot,
and i install linux in FB1080S scsi HDD. The system runs run, my scsi
CDROM & HDD
also my 3 IDE HDD & CDROM are detected.
However, everytime i recompile a new kernel , i need to disable the ide
controller in BIOS
setup before run lilo correctly or else the system can't boot.
--

  ____  ____  _  _    __    ____  __  __  _  _   ___  
 (  _ \( ___)( \( )  (  )  ( ___)(  )(  )( \( ) / __)
  ) _ < )__)  )  (    )(__  )__)  )(__)(  )  ( ( (_-.
 (____/(____)(_)\_)  (____)(____)(______)(_)\_) \___/
  _______  _                _     _    _     _  _     _  
 (_______)(_)   _          (_)   (_)  (_)   (_)(_)   | |
  _        _  _| |_  _   _  _     _    _______  _____| |
 | |      | |(_   _)| | | || |   | |  |  ___  ||  _   _)
 | |_____ | |  | |_ | |_| || |___| |  | |   | || |  \ \  
  \______)|_|   \__) \__  | \_____/   |_|   |_||_|   \_)
                     (____/
--------------ms6C7ABFCE8594648274D4179C
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Content-Transfer-Encoding: base64
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Can Linux support both IDE and SCSI hard frives in the same system??

Post by John A. Stewa » Tue, 13 May 1997 04:00:00


Sure - I have an IDE drive with Win'95 on it, and a SCSI drive for Linux.

lilo puts the boot image on the ide drive. Come to think of it; I need to add
the win'95 image to lilo - I currently can't boot it! :-)

BTW, I have a Future Domain card, and Win'95 does not even know about the SCSI
drive. My Bios has the ide as the first drive, and the scsi as the second, but
I don't think that the second drive in the bios matters.

--
"I wish to god these calculations had | John Stewart - CRC Canada

 
 
 

Can Linux support both IDE and SCSI hard frives in the same system??

Post by sean wal.. » Tue, 13 May 1997 04:00:00




> > Can a Linux system work with both IDE ans SCSI hard drives.? Please only

> Yes it works. Indeed you need a supported SCSI host adapter.

> My advice: avoid IDE if you use high speed serial/network cards.

????
Have you had problems with the two?  I have a couple computers with
SCSI, EIDE/IDE and network cards.  I haven't seen any problems...???
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sean Walton, KB7rfa (Tech+) [name mangled: "swalton" is username]
Intelligent Algorithmic Solutions (IAS)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
 

1. PATCH: support for IDE devices in ide-scsi with devfs

Currently using ide-scsi with devfs does not allow you to use hdparm
interface because no IDE nodes (block devices) are created. The patch
adds this.

Related patch for devfsd that creates old compatibility links is going
to devfs list. I do not think spcial new compatibility links are needed.

-andrej

--- linux-2.4.18-4mdk/drivers/scsi/ide-scsi.c.orig      Tue Mar  5 06:08:04 2002

        unsigned long flags;                    /* Status/Action flags */
        unsigned long transform;                /* SCSI cmd translation layer */
        unsigned long log;                      /* log flags */
+       devfs_handle_t de;                      /* pointer to IDE device */
 } idescsi_scsi_t;


  */
 static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi, int id)
 {
+       int minor = (drive->select.b.unit) << PARTN_BITS;
+
        DRIVER(drive)->busy++;
        idescsi_drives[id] = drive;

        set_bit(IDESCSI_LOG_CMD, &scsi->log);
 #endif /* IDESCSI_DEBUG_LOG */
        idescsi_add_settings(drive);
+       scsi->de = devfs_register(drive->de, "generic", DEVFS_FL_DEFAULT,
+                                    HWIF(drive)->major, minor,
+                                    S_IFBLK | S_IRUSR | S_IWUSR,
+                                    ide_fops, NULL);
 }


        if (ide_unregister_subdriver (drive))
                return 1;
+       if (scsi->de)
+               devfs_unregister(scsi->de);
        drive->driver_data = NULL;
        kfree (scsi);
        return 0;

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