Messages in this thread | | | Date | Sat, 12 Feb 2000 12:26:02 +0100 | From | Martin Bene <> | Subject | Re: Mirroring Root Disks |
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At 22:11 11.02.00 -0800, Andre Hedrick wrote: > >You have made an eligant point; regardless, I do not do what you propose >because ATA ...... the kernel does not yet know how to fake the OS in >switch to get a boot in a failure.
Depends on how dead the disk is: Disk is no longer detected by the bios -> no problem. The software solution is perfectly capable of booting from the 2nd drive if the first one is gone.
Still recogniced, but can't be read from -> Problem - manual interfention IS required.
As I concurred before, the hardware raid solution is superior - but then, there's a lot of room for different solutions and different reliability requirements - both with regards to financial and technical considerations.
>I will trump the debate with a $2600.00 ATA-Hardware RAID solution I >showed at LWE@NYC.NY 2000.
There's a lot of systems out there where even $2600 is too expensive, and where a software solution using, say, two $100 ATA drives can still greatly enhance reliability in omparisn to a system without any mirroring at all. Also, many systems just plain don't NEED 320GB of storage :-)
>$2600.00 == 320GB (8x40GB ATA Disks) and an 8-channel Host (3ware). >This was a RAID 0 stripe. >Imagine that you can remove the disks and shuffle in any order (on the >same card) and it finds-reconstructs the RAID?
Same goes for the software raid - disks can be moved around any way you want;
>SCSI can not touch 320GB in disks for $2600.00 USD.
Right on that one, price/performance for ATA Disks is currently really stunning.
Bye, Martin
"you have moved your mouse, please reboot to make this change take effect" -------------------------------------------------- Martin Bene vox: +43-316-813824 simon media fax: +43-316-813824-6 Andreas-Hofer-Platz 9 e-mail: mb@sime.com 8010 Graz, Austria -------------------------------------------------- finger mb@mail.sime.com for PGP public key
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