On 4/6/11 10:38 AM, Jan Ceuleers wrote: > On 04/04/11 14:33, Francesco Trentini wrote: >> sorry if this is not the proper channel, but I remember a discussion on >> Soekris list time ago about the possibility of the inclusion of a simple >> RAID1 chip on board. >> >> Due to the imminent new board 6501, and the presence of two SATA >> interfaces, this will surely be a very welcomed addition allowing to >> create a simple mirrored bootable array of two disks. > > Francesco, > > There is no need for a RAID chip in order to be able to boot from a > RAID1. I have been doing so in several machines using Linux's md > capabilities for several years.
freebsd-geom does the analogous thing, there are a few cases where a hardware raid controller would do a better job of hiding the failed disk from the bios, but I have survived primary disk failure including across reboots and with a newly inserted unformatted drive both in testing and in the field with both geom and md. a better protection in the case of a device like the soekris (and where you're trying to protect the contents of primary storage. would be to put the boot directory/code on a small flash and raid the primary storage. that's a lot cheaper than even the cheapest lsi raid-chipset, and probably fits the "good enough" category pretty well. > I am not often able to test whether the machine boots when one of the > mirror disks has failed (as opposed to just being absent), but on the > few occasions where this was the case it has indeed worked properly. > > Cheers, Jan > _______________________________________________ > Soekris-tech mailing list > [email protected] > http://lists.soekris.com/mailman/listinfo/soekris-tech > _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
