Hardware vs Software Raid in RH 7.x

[Brian Densmore]

This is interesting, but it is apples and oranges. One is only RAID 0
and the other is RAID 0/1.
Two -=very=- different mechanisms. I would expect RAID 0/1 to be slower,
since it is doing more work.

JM2C,
Brian

> -----Original Message-----
> From: Steven Hildreth [mailto:s_p_hildreth at yahoo.com]
> Sent: Sunday, March 10, 2002 5:18 PM
> To: jilindi at yahoo.com; kclug at kclug.org
> Subject: Re: Hardware vs Software Raid in RH 7.x
> 
> 
> I would like to offer some info about the latest server I 
> just finished
> (Friday Night) building for work.
> 
> It has two RAID arrays being used, one is a software array 
> using Six Quantum
> 6 gb UW (20 Mb Transfer rate) SCSI drives and I have them in a single
> striped RAID 0, to be used for backup purposes. The second 
> RAID is a RAID
> 0/1 using 4 60 gb IDE Maxtor ATA100 Drives and the onboard 
> Highpoint HP370A
> controller (which gives me a 104 usable ext3 formatted partition).
> 
> I have one of the array's mounted at /storage and the other 
> as /hpt (guess
> you can figure out which is which :)
> 
> This server is a SAMBA server, and the only benchmark testing 
> I have done is
> from a Windows XP LAN workstation. Transferring a 540 Mb ISO 
> File onto one
> of the shares (stored on the /storage point) and to another 
> share (on the
> /hpt point) the time differences where 58  seconds for the 
> /storage and 51
> for the /hpt.
> 
> Not really answering your questions, just thought someone 
> might find it
> interesting.
> 
> Regards,
> Steven
> 
> ----- Original Message -----
> From: "John Lindinger" <jilindi at yahoo.com>
> To: <kclug at kclug.org>
> Sent: Sunday, March 10, 2002 11:31 AM
> Subject: Hardware vs Software Raid in RH 7.x
> 
> 
> > Hello:
> >
> > Anybody out there using the Mylex AcceleRAID  150, 200, or 
> 250 in RedHat
> 7.x ?
> >
> > I am setting up my SGI 1400 server with RedHat 7.0 or 7.1. 
> The system has
> the Intel
> > SC450NX main board with the Symbios onboard SCSI 
> controllers. The onboard
> SCSI
> > controllers are upgradable to Hardware RAID by installing 
> an AcceleRAID
> card in PCI slot
> > B3
> >
> > I want to implement RAID Level 1 (mirror) for the /boot and 
> / partitions
> and RAID level 5
> > for the balance of my partitions.
> >
> > If I use software RAID as described in the RedHat 
> documents, it all seems
> easy enough.
> >
> > If I spend $50 to $100 for the Mylex AcceleRAID 150, 200, 
> or 250, then I
> can use hardware
> > RAID.  The RedHat hardware compatibility list refers me to...
> >
> >      http://www.dandelion.com/Linux/DAC960.html
> >
> > ...for the Linux drivers.
> >
> > The dandelion docs say that the I must recompile the 
> kernel, and if I want
> to boot from a
> > raid partition I must patch LILO & FDSIK. But it also says,
> >
> >   "Red Hat Linux 6.0 and SuSE Linux 6.1 include support
> >   for Mylex PCI RAID controllers. Installing directly
> >   onto a DAC960 may be problematic from other Linux
> >   distributions until their installation utilities are
> >   updated. "
> >
> > Can anybody tell me from experience what I must do to use 
> the hardware
> raid on RH 7. Is
> > all this recomiling and patching not needed for RedHat 7.X ???
> >
> > Thanks,
> > John Lindinger
> > Nebraska City, NE
> >
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