Networker

Re: [Networker] ADIC Scalar 100 + controller LSI logic 53C1010-66 with Legato 7.1.1 on Windows 2000: speed problem

2004-03-19 17:02:06
Subject: Re: [Networker] ADIC Scalar 100 + controller LSI logic 53C1010-66 with Legato 7.1.1 on Windows 2000: speed problem
From: Chad Smykay <csmykay AT RACKSPACE DOT COM>
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Date: Fri, 19 Mar 2004 16:01:49 -0600
Vito,

How many clients did you have backing up when you did your test?  How many
save sets per client did you specify?  I can push my LTO-2 drives up to over
50/Mbps sustained and good average of 30/Mbps.  But I am pushing a lot of
data to these drives usually 6-8 servers with about 12-14 save sets.  If you
want to see that could of push on your drives you really have to be pushing
a lot of data to the drives as well as sustained data.  Do you have multiple
drives?  Did you try and use just one drive with multiple clients and save
sets?  If not you can always use the BigASM ASM to create a lot of "pretend"
data for each client.  Let us know how you are pushing the drives and we
should be able to help.

Thanks,


Chad Smykay, RHCE, LCNA
Systems Storage Administrator
Rackspace Managed Hosting (TM)
210-892-4025 ext 1603
Cell: 210-273-2344

-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU] 
On
Behalf Of Vito Maltese
Sent: Friday, March 19, 2004 5:39 AM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] ADIC Scalar 100 + controller LSI logic 53C1010-66 with
Legato 7.1.1 on Windows 2000: speed problem

Hello,

We installed yesterday a new ADIC Scalar 100 with LTO Ultrium 2 drives.

For connecting the library above we used a SCSI I/O controller LSI Logic LSI
53C1010-66 (see
http://www.lsilogic.com/files/docs/marketing_docs/storage_stand_prod/raid/l
si53c1010_pb.pdf).

This controller has been installed on an Intel-based server (a Compaq/HP
Proliant ML370G3) running Windows 2000 server and the proper driver
(SYM_U3.SYS) has been installed.

On the Windows 2000 server above we have a Legato Networker server version
7.1.1 where also another library (DLT) in connected to another I/O
controller.
The new Scalar 100 has been correctly recognized and configured via
jbconfig.

This below is an output of the inquire command:

[email protected]:HL-DT-STDVD-ROM GDR8161B1102|CD-ROM
[email protected]:DEC     TL800    (C) DEC0525|Autochanger (Jukebox)
        S/N: 3G0BCR85H038
        ATNN:DEC     TL800    (C)
DEC3G0BCR85H038
        IENN:00900D2412A104D8
[email protected]:DEC     TZ89     (C) DEC296D|Tape, \\.\Tape0
[email protected]:DEC     TZ89     (C) DEC296D|Tape, \\.\Tape1
        S/N: PXA46S0107
[email protected]:COMPAQ  SCSI COMMUNICATECISS|Unknown Device Type
[email protected]:COMPAQ  LOGICAL VOLUME  2.86|Disk, \\.\PHYSICALDRIVE0

WWNN:600508B100104246464F424739370000
[email protected]:COMPAQ  LOGICAL VOLUME  2.86|Disk, \\.\PHYSICALDRIVE1

WWNN:600508B100104246464F424739370001
[email protected]:ADIC    Scalar 100      3.10|Autochanger (Jukebox)
        S/N: ADIC9F0014121
[email protected]:IBM     ULTRIUM-TD2     37RG|Tape, \\.\Tape2
        S/N: 1110101853
        ATNN:IBM     ULTRIUM-TD2
1110101853
[email protected]:IBM     ULTRIUM-TD2     37RG|Tape, \\.\Tape3
        S/N: 1110101880
        ATNN:IBM     ULTRIUM-TD2
1110101880



I did some test speed using the bigasm directive on the same server where
the library is connected (no network interaction...) and now we have the
problem: the maximum speed obtained is 7 Mb/s. According to the specs, the
mounted IBM LTO2 drives should offer a transfer rate around 35 Mb/s...

Following the Legato Networker Performance Tuning Guide, I modified the
block size for the LTO2 drives. Default value for Legato on Windows 2000
with LTO2 drives is 64k, I set is to 256k with this method:

- using the environment NSR_DEV_BLOCK_SIZE_LTO_ULTRIUM_2
- modifing the registry value at
 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Sym_u3
\Parameters\Device]
 "MaximumSGList"=dword:00000041

Speed is always the same even after the block size modification...



Thanks for any possible help.




Vito

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