Date: Wed, 9 Jun 2004 05:06:38 -0700 From: Sandy Rutherford <sandy@krvarr.bc.ca> To: Peter Jeremy <PeterJeremy@optushome.com.au> Cc: freebsd-hardware@freebsd.org Subject: Re: Tape drive support in mlx driver? Message-ID: <16582.64846.807035.40352@szamoca.krvarr.bc.ca> In-Reply-To: <20040608084133.GD622@cirb503493.alcatel.com.au> References: <16577.22341.271281.286853@szamoca.krvarr.bc.ca> <20040608084133.GD622@cirb503493.alcatel.com.au>
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Peter, On Tue, 8 Jun 2004 you wrote: > On Fri, 2004-Jun-04 22:16:53 -0700, Sandy Rutherford wrote: >> Are tape drives supported with the Mylex DAC RAID controllers? I have >> been unable to get it to work or find anything about tape drives in >> the mlx documentation? > Tapes aren't supported by DAC960's on Compaq/HP Tru64 Unix so I > suspect it is non-trivial (though I vaguely recall that they were > supported by NT/Alpha so it may be possible). The eXtremeRAID 1100 isn't a DAC960; it's a DAC1164P. Here is my understanding of the situation: The DAC960 only supports firmware up to ver. 4.x. However, the DAC1164P supports firmware up to ver. 5.x. Although, Mylex firmware <= 4.x does not support tape drives, ver. >= 5.x supports both tape drives and cdroms. The mly(4) driver works for Mylex RAID controllers with firmware >= 6.x. mly(4) does interface to the SCSI sub-system and would therefore presumably handle tape drives. The mlx(4) driver is for firmware <= 5.x and it does not interface to the SCSI subsystem. So, it seems that the DAC1164P falls through the crack in the middle. I have no idea how different the 5.x firmware is from the 6.x firmware and whether it would be feasible to get mly(4) working with 5.x firmware. After an extensive search, I have not been able to find 6.x firmware for the DAC1164P. It seems that 5.x is the most recent available for this controller. Thanks, Sandy
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