Re: [LUG] Scsi luns?

[Neil Stone <Neil@xxxxxxxxxxxxx>]

You did remember to compile in "SCSI Emulation" in the kernel didn't you
?

On Sun, 2002-06-16 at 07:56, Theo Zourzouvillys wrote:
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   On Wednesday 12 June 2002 11:21 pm, lee quick wrote:
   
   moooo,
   
   sorry such a late reply, i've only just got found time to read through dclug, 
   maybe you've fixed it by now ;)
   
   > I have a IDE cd writer and a usb thumbdrive and both identify themselves
   > to linux as scsi devices, /dev/sda1 (for the usbdrive) /dev/scd (for the
   > writer)
   >
   > Now i have added not so long ago an adaptec controller and 2gig ibm scsi
   > hardrive.
   >
   > Linux see's the hardrive and the controller however i cannot access the
   > dam thing.
   
   when you say it sees it, what do you mean? do you see it on bootup in dmesg, 
   or can you see the drive itself in /proc/partitions? (which i doubt)
   
   what is the contents of /proc/scsi/scsi, and what directories are there in 
   /proc/scsi/? in each of the dir's should be files for each channel - which 
   devices show where?
   
   >
   > Could it be than the harddrive is set to 0 on the LUN setting and the
   > fake scsi devices hog
   > setting zero?
   > Would changing jumpers on the hardisk have any affect?
   
   afaik with my limited knowlege of mix/matching scsi + ide-sci stuff, the 
   ide-scsi stuff doesn't really hog any real resources, and the settings on the 
   disks only affect the hardware itself, *i belive*, but don't quote me on that 
   ;)
   
   > If i do find it would it be able to be integrated into my Raid0 setup as
   > an extra drive to give a raid5 setup?
   
   it depends on the size of your other drive really (and the speed of it and the 
   controler), though actually moving the data from one to the other may prove 
   hard unless you've got someone you can store it temporarilly (i usually rsync 
   an md device to another box on the network, re-create the array then sync 
   back) moving from raid0 to raid5 isn't possible, i don't think without 
   recreating the array.
   
   ~ Theo, i think.
   
   - -- 
   
   Theo Zourzouvillys
    http://zozo.org.uk/
   
   You will wish you hadn't.
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Neil

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