Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread nodje
I couldn't find any answer to the question.The problem is that the installer shows up all the disks instead of proposing to install somewhere on the RAID5 partition, in other words, it just doesn't recognize the RAID5. Is it possible at all to install freeBSD on one of those RAID?? I've found out

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Vince
Sounds like you have one of those 'fake' raid controllers (http://linux-ata.org/faq-sata-raid.html ), where its software raid with a hook into the bios so its bootable, while the work is done in software. This isnt supported by Freebsd (the fake raid 1 is supported by the ataraid driver for many

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Jerry McAllister
On Wed, Oct 10, 2007 at 03:35:54PM +0800, nodje wrote: I couldn't find any answer to the question.The problem is that the installer shows up all the disks instead of proposing to install somewhere on the RAID5 partition, in other words, it just doesn't recognize the RAID5. Is it possible at

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Philip M. Gollucci
Jerry McAllister wrote: On Wed, Oct 10, 2007 at 03:35:54PM +0800, nodje wrote: I couldn't find any answer to the question.The problem is that the installer shows up all the disks instead of proposing to install somewhere on the RAID5 partition, in other words, it just doesn't recognize the

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Jerry McAllister
On Wed, Oct 10, 2007 at 04:19:02PM -0400, Philip M. Gollucci wrote: Jerry McAllister wrote: On Wed, Oct 10, 2007 at 03:35:54PM +0800, nodje wrote: I couldn't find any answer to the question.The problem is that the installer shows up all the disks instead of proposing to install

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Jeff Mohler
Did you know that most oh my god RAID failures happen during the reconstruction of a failed drive? .Especially on SATA as the non-recoverable-bit-error math is so much easier to run into. I think..that on a 500G drive, there are enough bits to read/write that mathematically you could run into a

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Nodje
well, you mean on RAID5 then, coz there's probably no math in reconstructing a RAID1. Why would the math on SATA be less reliable than on SCSI??? Where d'you read that anyway?? Jeff Mohler wrote: Did you know that most oh my god RAID failures happen during the reconstruction of a

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Jeff Mohler
SATA drives just aint built with the same resiliency as SCSI, hence the massive difference in cost. So..as an example, the Hitachi 500G 7K500 drive has a non recoverable bitrate of 1 in 10^14th. The 10K300 FCAL (basically scsi) drive is 1 in 10^16th. Those two zeros mean a _lot_. I removed a

Re: Installing freeBSD on an Intel RAID5 partition

2007-10-10 Thread Nodje
hum let's keep practical here please. The question is whether you can use SATA RAID as a reasonable HD failure protection system or not. Can a Raid1 on two HD, say less than 500Gb, be consider as a good protection against HD failure? It still seems to be for me. (I consider