Re: [MLUG] Hard drive question

[Phillip Kelchen <EMAIL:PROTECTED>]

You can play around with an "SCSI" subsystem with regular Serial ATA drives. 
And a modern SATA-300 (also called "SATA-II") drive has a 300MB/sec data 
transfer rate, which is very, very close to the 320MB/sec of U320 SCSI, but 
is far cheaper. 

Phillip

On Friday 02 June 2006 08:22, Jennifer Dozar wrote:
> Thanks guys :) that helps clear a little up. I don't remember the exact
> question on the test now, but I wasn't really sure how it read them. I
> haven't had a lot of SCSI drives the past few years playing with Linux.
> Practice usually helps me.  Maybe my next computer I build i'll get a
> few SCSI drives and just poke around with it that way. Just to get the
> expereince. I do remember SCSI being a bit better for servers cause of
> the data rate on the cables (I think!) but it's been forever.  I'm stuck
> using windows all the time, so i'm starting to feel kind of dumb, and
> numb minded.
>
> On Fri, Jun 02, 2006 at 09:07:15AM -0500, Phillip Kelchen wrote:
> > An IDE hard drive will appear as /dev/hd* and a Serial ATA or SCSI (or
> > USB/IEEE 1394 drive for that matter) will appear as /dev/sd*. The ways to
> > set parameters on IDE and SATA/SCSI drives are different. The IDE and
> > SCSI/SATA drives sometimes use different kernel modules to allow for data
> > transfer, although modern libata versions handle IDE and SATA modules.
> > SCSI is a different animal, especially Serial Attached SCSI (SAS.) It
> > requires some different kernel options and modules. However, you do need
> > to enable SCSI disk support to use SCSI, SATA, or USB mass storage
> > devices, so I bet that the disk drivers between IDE and SCSI/SATA/USB are
> > different as well.
> >
> > The drives behave similarly in the computer- they all can be partitioned,
> > mounted using the same mount commands, etc. And it is pretty likely that
> > people would have different kinds of drives in their computers as optical
> > drives are IDE and appear as /dev/hd* and hard drives are now mostly all
> > SATA in new builds. Here's my /etc/fstab, and you can see that I have two
> > SATA HDDs and two IDE optical drives:
> >
> > # <fs>                  <mountpoint>    <type>          <opts>
> > <dump/pass>
> >
> > # NOTE: If your BOOT partition is ReiserFS, add the notail option to
> > opts. /dev/sda1               /boot           ext2            noatime    
> >     1 2 /dev/sda3               /               xfs             noatime  
> >       0 1 /dev/sda2               none            swap            sw     
> >         0 0 /dev/hda	         /mnt/dvd        auto            noauto,user
> >     0 0 /dev/hdb                /mnt/cdrom      auto           
> > noauto,user     0 0 /dev/fd0                /mnt/floppy     auto         
> >   noauto,user     0 0 /dev/sda4               /local          xfs        
> >     noatime         0 2 /dev/sdb1               /home           xfs      
> >       noatime         0 2
> >
> > In addition, I have a USB memory card reader than ivman will mount as
> > /dev/sdc or /dev/sdd when I stick a card into the reader, dependent on
> > which slot I stick the cards into. My USB thumb drive shows up as
> > /dev/sde.
> >
> > I hope this helps!
> >
> > Phillip
> >
> > On Friday 02 June 2006 07:56, Jennifer Dozar wrote:
> > > I am curious, mainly cause i was intrigued by a Linux Admin test I took
> > > for a job last night, and i didn't really know.  One question asked
> > > about transferring data from an IDE drive to a SCSI drive. Can anyone
> > > explain this to me?  I figured Linux just saw it as another hard drive,
> > > not necessarily a "different type" of drive.  So, i'm just wondering if
> > > anyone can help me out with that. I haven't ever come across this, but
> > > doesn't mean i won't someday.  how many computers actually have both
> > > types? don't mostly motherboards and such stick to one type of connect
> > > for drives?
> >
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