Actually, HP-UX, on HP9000 V-class, has a journaling file system. I've got
EMC coming in this afternoon, I'll ask them about the battery backup on the
write-back cache. My memory may be fuzzy, but I thought it was an option, on
Symetrix. I build 99.99+% sites ... that's what I do.
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Matthew Clark
> Sent: Tuesday, November 02, 1999 1:53 AM
> To: linux-raid; [EMAIL PROTECTED]
> Subject: RE: PROs and CONs of booting RAID?
>
>
> We have an HP Netserver which is set up in exactly this way..
> but UPS or
> not, if someone (perhaps intentionally) removes the power
> cords from the
> power supplys, or the machine (it's never done this yet) just
> crashes, what
> happens to the filesystem on the RAID?
>
> I like the sound of the two technologies mentioned by James Manning
>
> Matthew Clark.
>
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Roeland M.J.
> > Meyer
> > Sent: 02 November 1999 04:22
> > To: [EMAIL PROTECTED]; 'linux-raid'
> > Subject: RE: PROs and CONs of booting RAID?
> >
> >
> > Actually, on High-Availability systems (like an HP 9000 V2500
> > pair, sharing
> > an EMC RAID box), the standard is to boot from an internal
> RAID set. The
> > entire system is presumed to be on a UPS system. In extreme
> > cases, there is
> > enough local UPS installed for the system to run at least 10
> > minutes if the
> > main UPS goes dead. This is in addition to dual hot-swap
> power supplies in
> > each chasis.
>
