-----Original Message----- From: fedora-list-admin@xxxxxxxxxx [mailto:fedora-list-admin@xxxxxxxxxx] On Behalf Of Xose Vazquez Perez Sent: Wednesday, November 26, 2003 2:46 PM To: fedora-list@xxxxxxxxxx Subject: Re: RAID options under Fedora WipeOut wrote: > I would say the software RAID built into linux is better than most of > the IDE RAID cards on the market.. And *SCSI RAID* too. There are too much bad HW RAID out there. -----Original Message----- TWIMC - Concerning HW RAID: We have deployed over 200 systems at various customer sites with 3ware IDE raid controllers over the past year. We also use them exclusively in house. See http://www.integratedsolutions.org//internal_pci.htm or http://www.3ware.com for details. These controllers survived the Virginia Hurricane at our ISP's site and endured 132 degree F ambient temps (their NOC lost cooling but not power) for 3 days without any failures as did the disk arrays. 1) We have not had one fail in the field or inhouse and all our servers use them. My dual cpu workstation has one in it set up as RAID 0 with 2 disks for speed and it benchmarks at better than 98 MB/sec for both Windows XP Pro and linux RH 9 for intelligent reads and writes (It's a dual boot machine). 2) A RAID 10 setup with 4 or 6 IDE disks can sustain - yes sustain - 90 to 120 MB per second for 100 Mbyte transfers over the whole array measured using zcav (a utility that comes with bonnie++). 3) The 3dm daemon based utility allows complete control and maintenance of the array via a web browser. 4) The driver source has been public domain and included in linux since kernel rev 2.2.15 - check your machine in the /lib/module/kernel/scsi directory for file 3w-xxxx.o - its there!!! You can easily update the driver to the latest kernel by downloading the source from the 3ware web site and following the directions. This allows you to upgrade the kernel as often as you like and then update the drivers if needed. 5) The increase in performance while maintaining data redundancy is amazing and done completely in hardware unlike the promise and other based controllers. Check out the benchmark on our web site under storage for the actual numbers. Seth Bardash Integrated Solutions and Systems http://www.integratedsolutions.org Supplier of AMD, Intel and SPARC Servers and Systems running Windows, Linux, Solaris and VxWorks.
