Re: New SSD options for IBM Power Systems provide enhancedperformanceat a lower cost

On Apr 20, 2016, at 9:00 AM, Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx> wrote:

Maybe because it was developed just for the newly announced devices and since regular SSDs are covered under normal maintenance it really does not matter?

--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob Berendt
Sent: Wednesday, April 20, 2016 7:58 AM
To: Midrange Systems Technical Discussion
Subject: Re: New SSD options for IBM Power Systems provide enhancedperformanceat a lower cost

Apparently you cannot run that on a system with just regular SSD's.
CPF7216 - Requested advanced analysis command SSDGAUGE is not supported.
But that could just be an assumption on my part as to why I am getting that message. IBM doesn't document 'why'.

http://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/apis/qsmgsstd.htm?lang=en


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Steve Pavlichek <spavlichek@xxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 04/20/2016 08:07 AM
Subject: Re: New SSD options for IBM Power Systems provide
enhancedperformanceat a lower cost
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Paul,
No need to worry about wearing out your current SSDs. The maintenance
policy change only affects the new 1.9TB Read Intensive drives. IBM has
published a tool for customers to monitor the wear cycle on these new
drives called the IBM i SSD Fuel Gauge.

www.ibm.com/developerworks/ibmi/techupdates/hw/issdfuelgauge

If your just interested in read/write ratio I would recommend running the
Resource Report under Performance Tools Reports. This will show you the
R/W ratio for each PT time slice(Typically 15 minutes).


-----Original Message-----
From: Steinmetz, Paul
Sent: Tuesday, April 19, 2016 4:26 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: New SSD options for IBM Power Systems provide
enhancedperformanceat a lower cost

Steve,

If I currently have 100% SSD in Production LPAR, is there a way to
determine if I'm read or write intensive?

Production LPAR P7 740 82051-E6C
V7R1 Latest CUM, TR11
155 gb mem
1.5 CPU
5913 PCIe2 1.8GB Cache RAID SAS Adapter Tri-port 6Gb
100% SSD (13) ES0H 775GB SFF-2 SSD for IBM I
Raid5, 2 parity sets, 2 hot spares.
Disk response time - .2 ms no wait time -
Increases from .2 to 2.0 during nightly save
577D 8 Gigabit PCI Express Dual Port Fibre Channel Adapter

Paul

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Steve Pavlichek
Sent: Tuesday, April 19, 2016 3:57 PM
To: Midrange Systems Technical Discussion
Subject: Re: New SSD options for IBM Power Systems provide enhanced
performanceat a lower cost

One item to note on the 1.9TB SSDs. These are high capacity/low cost SSDs
designed for READ intensive applications and do not carry the typical IBM
maintenance. Once they reach their “Write” limit they are considered worn
out and IBM will not replace them under maintenance contract.

•Write intensive workloads can “wear out” the drive -- watch your fuel
gauge to monitor usage •Approximately 3,394 TB of data can be written to
drive, but may be somewhat larger •Drive Write Per Day (DWPD) rating of
“1”
•Use RI SSD when you are confident your write workload is reasonable



-----Original Message-----
From: Steinmetz, Paul
Sent: Tuesday, April 19, 2016 3:23 PM
To: 'Midrange Systems Technical Discussion'
Subject: New SSD options for IBM Power Systems provide enhanced
performanceat a lower cost

Do number of arms still matter?

http://www-01.ibm.com/common/ssi/cgi-bin/ssialias?infotype=an&subtype=ca&appname=gpateam&supplier=897&letternum=ENUS116-036


http://www-01.ibm.com/common/ssi/rep_ca/6/897/ENUS116-036/ENUS-116-036-LIST_PRICES_2016_04_12.PDF




Thank You
_____
Paul Steinmetz
IBM i Systems Administrator

Pencor Services, Inc.
462 Delaware Ave
Palmerton Pa 18071

610-826-9117 work
610-826-9188 fax
610-349-0913 cell
610-377-6012 home

psteinmetz@xxxxxxxxxx<mailto:psteinmetz@xxxxxxxxxx>
http://www.pencor.com/

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