I remember when we had 1, yes only one 3370 on our S/38 , 571 MB, at $35,000 each.
We eventually ended up with 8; 2 strings of 4 each.
https://www-03.ibm.com/ibm/history/exhibits/storage/storage_3370.html
No disk protection back then, so when they failed, it was a system reload, and we had many.
IBM introduced the IBM 3370 Direct Access Storage Device in January 1979 for IBM 4331, 4341, and System/38 midrange computers.[39] It has seven fixed 14-inch (360 mm) disks, and each unit has a capacity of 571 MB. It was the first HDD to use thin film head technology; research on that technology started at Thomas J. Watson Research Center in the late 1960s.[39] The 3370 was a fixed block architecture device, used on DOS/VSE and VM, the only S/370 operating systems that supported FBA devices.
https://en.wikipedia.org/wiki/History_of_IBM_magnetic_disk_drives
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Paul Nelson
Sent: Wednesday, February 28, 2018 3:01 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Current PTF groups and SPECTRE/MELTDOWN
5 MB? We thought we were in high cotton when we got to upgrade from 1.2 MB to 2.4 MB.
Paul Nelson
Cell 708-670-6978
Office 409-267-4027
nelsonp@xxxxxxxxxxxxx
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob Berendt
Sent: Wednesday, February 28, 2018 1:35 PM
To: Midrange Systems Technical Discussion
Subject: RE: Current PTF groups and SPECTRE/MELTDOWN
Someone found a gauge but it only works for the "read intensive" SSD's, not for my models.
I don't think they would all die at once. So what I did was use RAID5 with two hot spares. (I have plenty with space to spare. While I get that leaving 1.4TB tied up in hot spare may choke some greybeard who remembers a 5MB platter being a big thing.)
We had some even older SSD's on our Power 6. We didn't bring them across.
That was a much smaller pool, I think it was only four drives.)
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: "Steinmetz, Paul" <PSteinmetz@xxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 02/28/2018 02:21 PM
Subject: RE: Current PTF groups and SPECTRE/MELTDOWN
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
Rob,
<older SSD's in ASP2
We were thinking of doing something similar.
I have 13-775gb SFF-2 SSD for IBM i - ESOH.
Was thinking of using these for R&D LPAR on new P9
Will these ever stop working, if so, when and how does one measure.
Thanks
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob
Berendt
Sent: Wednesday, February 28, 2018 1:28 PM
To: Midrange Systems Technical Discussion
Subject: RE: Current PTF groups and SPECTRE/MELTDOWN
Well, maybe memory?
But probably the maintenance is the biggest thing.
Main ERP lpar:
% CPU used . . . . . . . : 23.5
System Pool Reserved Max -------DB------- -----Non-DB-----
Pool Size (M) Size (M) Active Faults Pages Faults Pages
1 6920.6 3599.1 +++++ .0 .0 .1 .2
2 31176.9 22.5 1880 6.6 1352.4 19.5 63.4
3 1299.0 1.2 51 .0 1.4 1.4 10.4
4 23638.8 .0 558 27.0 7037.3 33.9 127.0
5 66868.5 7.1 2797 11.5 2495.7 42.4 89.5
Main Domino lpar
% CPU used . . . . . . . : 12.0
System Pool Reserved Max -------DB------- -----Non-DB-----
Pool Size (M) Size (M) Active Faults Pages Faults Pages
1 5343.9 2777.1 +++++ .0 .0 .0 .0
2 106924.8 33.5 1274 .0 .0 205.1 646.8
3 1145.5 .0 287 .0 .0 19.6 27.9
4 1145.5 .0 5 .0 .0 .0 .0
Eight Domino servers on WRKDOMSVR.
Both lpars are hosted by the same hosting lpar
% CPU used . . . . . . . : 2.8
System Pool Reserved Max -------DB------- -----Non-DB-----
Pool Size (M) Size (M) Active Faults Pages Faults Pages
1 2094.91 1084.25 +++++ .0 .0 .0 .0
2 25669.56 16.22 379 .0 .0 .9 4667.2
3 3119.57 .00 780 .0 .0 4.6 4.6
4 311.95 .00 5 .0 .0 .0 .0
With 32 SSD drives in ASP1 and the same quantity of older SSD's in ASP2.
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: Justin Taylor <JUSTIN@xxxxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 02/28/2018 11:01 AM
Subject: RE: Current PTF groups and SPECTRE/MELTDOWN
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
So why the upgrade (if I may ask)?
-----Original Message-----
From: Rob Berendt [mailto:rob@xxxxxxxxx]
Sent: Wednesday, February 28, 2018 9:52 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: Current PTF groups and SPECTRE/MELTDOWN
<snip>
The good news is most customers had the extra CPU available since these
machines are so big.
</snip>
Our main production ERP lpar:
% CPU used . . . . . . . : 3.5
Our main Domino lpar:
% CPU used . . . . . . . : 3.6
Yep, can't wait to get those P9's in here... :-)
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
midrange.com
