LTO-3 is not supported according to the system configuration guide for 7.0,
should also apply to 7.0.0.1P7,
The maximum is LTO-2.
However, the "Data Protection - supported devices" says that a (password
protected) configuration file is needed.
(http://www.netapp.com/solutions/data_protection_devices.html) I was able to
download without requiring an additional password
Are you using the right tape device name ? Such as nrstXa (x=0,1,2,3,4) ?
Bye
Ernie
-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On
Behalf Of Ronny Egner
Sent: Monday, November 21, 2005 11:50 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Poor performance backing up netapp filer via FC to
LTO-3
OK. Here are some more information:
We are using a FAS920 with ONTAP 7.0.0.1P7.
There are 28 disks with 73 GB and 28 disks with 146 GB capacity. The disks
are split up into two aggregates: 26 disks (73 GB) with double parity are
"aggr1" and 26 disks (146 GB) with double parity are "aggr2". The
flex-volumes are created within the aggregates. The left over disks are
spare disks (two for each aggregate).
I´ve dumped a 10 GB flex-volume and measured the system load this morning.
The tape writes up to 25 MB/s and the system load was approx 20%. The disks
are nearly idle compared to the maximum of 130 MB/s i´ve seen on the same
volume.
And i am using brand new lto-3 tapes as well. And they have new labels,too.
I will now open a case at netapp.... Perhaps this is a bug in ONTAP
7.0.0.1P7....
> I've been out of the loop for sometime, spending most of my time on
> the other side of netapp filers. But somewhere in the back of my mind
> I seem to remember that lto3 uses a different type of tape compared to
> lto-2. If this is true then it could be the source of your problem.
>
> On the otherhand: what makes you believe that the backup performance
> should increase when you replace the tape drive ? If the combination
> filer/filesystem can only supply 25MB/sec then it won't make a
> difference if you replace the drive with an lto4/5/6/7/whatever.
>
> You did not tell us the type of filer, the ontap version, the size of
> the volume, the raidsize, the raidtype, and the number of
> files/average size of the files being backed up. This would give a lot
> of information required to see if the filer is really performing badly
> or if the situation is normal.
>
> You should not forget that a tape drive is like a hose pipe, the
> larger the diameter the more water can be transported, but it is your
> task to pump sufficient water into the hose pipe. ;-)
>
> Bye
> Ernie
>
> -----Original Message-----
> From: Legato NetWorker discussion
> [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Ronny Egner
> Sent: Saturday, November 19, 2005 11:11 AM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: [Networker] Poor performance backing up netapp filer via FC
> to LTO-3
>
>
> Hi list,
>
> we are backing up our netapp filer by ndmp. The tape drive
> is connected via fibre channel. We upgraded the drive from lto-2 to
> lto-3 recently. However: the backup performance havent changed since
> then (approx 25 mb/s). The new lto-3 drive should come up with more
> than 50 mb/s....
>
> Any help ?
>
>
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