Re: Open source storage

Steve Cousins <steve.cousins@xxxxxxxxx> wrote:


Bill Todd wrote:

There's nothing there that even remotely hints at data corruption on
power loss: the defined semantics of any normal Unix-style file
system (including ZFS) specifies that any user data that hasn't been
explicitly flushed to disk may or may not be on the disk, in whole or
in part, should power fail (that's what write-back caching is all
about: ...


Sorry to go off on a tangent but I think it is somewhat relevant since S
was talking about Enterprise storage: How common is it for enterprise
storage vendors to have disks with firmware that makes it impossible to
the enable write-back cache? We have an SGI NAS (IS4500) where this is
the case and it took me a little by surprise, although it does make a
lot of sense when you have 100 TB storage. Does most or all enterprise
storage permanently disable write-back cache?

Thanks,

Steve


Ha, I'm more shocked that anything from SGI is still in use.
.

Relevant Pages

  • Re: Agami
    ... Anyone have experience with Agami or similar? ... Panasas and Isilon are both considered enterprise class storage and ... "enterprise" stuff should not have limitiations like flakey drives, ... What would one call a storage system made with first rate drives, ...
    (comp.arch.storage)
  • Re: email capacity
    ... can be manage the old mail in the user's computer when server not available. ... Outlook can auto-archive, mailbox Manager or 3rd party software. ... Otherwise...get the Enterprise edition and a lot of storage space. ...
    (microsoft.public.exchange.admin)
  • Problem in accessing two Storage Box (D1000,A1000) simultaniously from E 4500 Sun Server.. please he
    ... Attaching two Storage box simultaniuosly to my Enterprise ... and my E 4500 is booting through the one HDD from D1000 Storage Box. ... Sun Server just like D1000 Stogarge Box. ...
    (SunManagers)
  • Re: What Happened to the MMU?
    ... They're in storage, I believe. ... There's one hanging above Enterprise at the Udvar-Hazy. ...
    (sci.space.history)