Thank you very much, that's our next approach as we did try 2x600 LV's with 
better success.

Regards,

Charles 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
Wheelock, Michael D
Sent: Friday, November 12, 2004 9:56 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: TSM and SATA Disk Pools


Hi,

I have had issues with Fibre disks when they were cut into huge raw lv's
like this.  I am no expert, but I think there is something weird about
TSM's handling of large raw lv's that introduces a serialized step (not
sure exactly, but it seemed to really bottleneck after I added two large
lv's...when I split them, things were fixed without changing any
hardware/raid settings).

Michael Wheelock
Integris Health

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Hart, Charles
Sent: Friday, November 12, 2004 9:22 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: TSM and SATA Disk Pools

Been asking lots of questions lately.  ;-) 


We recently have put our TSM Disk Backup Pools on Clarrion SATA.  
        The TSM Server is being presented as 600GB SATA Chunks
        Our Aix Admin has put a Raw logical over two 600GB Chunks to
create a 1.2TB Raw Logical Volume

Right now we are seeing Tape migrations @ about 4GB in 6hrs, where
before on EMC Symetrix disk we saw 29-40GB per hour.  If anyone would
like to share their TSM SATA Diskpool layout and or tips we would much
appreciate it!!!
        

TSM Env
AIX 5.2
TSM 5.2.4 (64bit)
p630 4x4
8x3592 FC Drives

Regards,

Charles 
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