>>>>> On Mon, 9 Feb 2009 13:31:20 +0100, Kern Sibbald said:
>
> On Monday 09 February 2009 13:10:12 Martin Simmons wrote:
> > >>>>> On Sat, 7 Feb 2009 12:17:33 +0100, Kern Sibbald said:
> > >
> > > On Saturday 07 February 2009 11:33:58 Ralf Gross wrote:
> > > > Kern Sibbald schrieb:
> > > > > The problem described in the email below is probably an important
> > > > > data loss problem due (most likely) to an I/O error, but more
> > > > > importantly due to a misconfigured tape drive. From the information
> > > > > I see below, it appears to me that you have lost significant data.
> > > > > This is probably due to the fact that the HBA or the tape drive is
> > > > > running in asynchronous mode (cached or buffered) while Bacula
> > > > > *requires* you to run everything concerning tapes in synchronous mode
> > > > > -- please see the Tape testing chapter for more information.
> > > > >
> > > > > This data loss due to asynchronous mode will probably also occur when
> > > > > your tape fills.
> > > >
> > > > The verify job hasn't found any errors, so it seems that all data
> > > > that was backed up could be read.
> > >
> > > Verify will not find missing data, unless you restored everything and
> > > compared it to the original, so I am still a bit skeptical ...
> >
> > What is the purpose of Verify then?
>
> The current tape Verify checks the meta-data. Thus it does not 100% verify
> that the data on the volume is all present.
Ah, thanks. I thought it recomputed the digest, but I see that only happens
for file verification, not volume verification.
__Martin
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