Agreedwas just indicating that you could only do 2 at a time but that does
leave you exposed. In reality, with raid 6 I would not replace anything until
it failed, but would certainly not wait once the failure it notified.
Kenneth A. Bloom
CEO
Avenir Technologies Inc
/d/b/a Visara
On 7/7/20 4:40 PM, Ken Bloom wrote:
Side note, if you want to be proactive And replace drives
preventatively, remember that for raid 5 you can only do one drive at
a time, raid 6 2 drives,
I would *STRONGLY* *DISCOURAGE* replacing two drives in a RAID 6 at the
same time. Doing so renders
We have never seen that. We always use raid 6 for both our VTL AND DASD
products with multiple hot spares.
Ken
Kenneth A. Bloom
CEO
Avenir Technologies Inc
/d/b/a Visara International
203-984-2235
bl...@visara.com
www.visara.com
> On Jul 7, 2020, at 6:31 PM, Grant Taylor
>
On 7/7/20 8:52 AM, R.S. wrote:
Few words about RAID:
RAID is more reliable than single disk. Assuming same reliablity of disk
used in RAID.
That starts to get questionable when you have more and more disks in a
RAID array.
It's a numbers game of how likely is it to have two drives fail in
Mike
It depends on the size of the Arrays and the type of SSD’s being used.
Enterprise level SSD’s Are mixed read / Write with at least 3DRPD (disk writes
per day) performance should last at least 5 years or more. We have not seen
other than sporadic failures in both HDD AND SSD and
On 7/7/20 12:41 PM, Pommier, Rex wrote:
Has anybody else heard this?
I've heard of and have experienced this multiple times.
The stress of rebuilding can push other marginal drives over the edge.
This is why RAID with multiple parity drives is now critical.
Especially with larger and larger
RAID with SSD is very susceptible to failure. The SSDs from the same
batch will die at about the same number of writes. So be sure to
check the number of bad blocks and do proactive replacement. Maybe
space a week apart so the next set will give you some time.
On Tue, Jul 7, 2020 at 2:52 PM
One company had computer centers in two cities. Hurricane Katrina was
coming, so the work was transferred from Miami to New Orleans. Miami
took quite a while to come back up.
On Tue, Jul 7, 2020 at 3:28 PM Joe Monk wrote:
>
> In Houston, Texas, a hurricane is VERY likely.
>
> Joe
>
> On Tue,
Hi Bob,
"... But if you want to know all the kinds of access you have, you'd
need to ask the question three or four times, for read, update, execute
and create. ..."
This statement is not true.
I published an Assembler program and a Rexx Exec here on June 14.
My program has been placed on
Nothing useful to say about your first question, but about the second: I can
think of two ways to pull your access information for a list of datasets.
1) Query the system about which security app is running (RACF, ACF2 or TSS),
then issue the commands and parse the output. Display only the
On 7/7/20 8:25 AM, Paul Gilmartin wrote:
What benefit is there in each product's having its own idea of where
the key files are?
PuTTY has has it's own key file location, and format, for many years.
For quite a long time it was the predominant SSH client on Windows, thus
things modeled off
Richard,
Can you please send me the complete joblog offline that you ran with
PGM=SORT?
Thanks,
Kolusu
DFSORT Development
IBM Corporation
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This is what we have.
ITEM JCL (ICEAM1) VALUE INV (ICEAM2) VALUE TSO (ICEAM3)
VALUE TSOINV (ICEAM4) VALUE
-- - -
- --
Regarding the second disk failing while the first was rebuilding, I've heard
more than once that a second failure in a RAID array shortly after the first,
while the rebuild is happening is not that uncommon. Something about the
sudden extra stress on the rest of the drives in the RAID set due
You'd have to write your own. You can start with LMDLIST and then add your
other info to generate a table display.
Lionel B. Dyck <
Website: https://www.lbdsoftware.com
"Worry more about your character than your reputation. Character is what you
are, reputation merely what others think you
The password might be sent in the clear - but that is an SNA SLU (the TN3270
LU for the terminal session) to PLU (CL/Supersession) session and as such
would require looking into methods for encrypting SNA sessions in the Comm
Server manuals. I'm pretty sure it's not flowing over IP if
I have some questions about the ISPF 3.4 utility.
1. Why does 'Referred' show on the "total" display for datasets, but if you
print the dataset list, you don't get it?
2. Are there ways to extend what is displayed? For one example: I would like
to have column for 'Your Access' that would
Richard,
Your shop probably has OUTSEC set to NO. OUTSEC specifies whether DFSORT
uses automatic secondary allocation for output data sets that are temporary
or new. OUTSEC=YES is the default.
You can run the following job to list the installation defaults
//STEP0100 EXEC PGM=ICETOOL
Assuming that structure is free for all to use! (Open Source joke)
On Mon, Jul 6, 2020 at 12:39 AM Timothy Sipples wrote:
> There's a good organizational structure potentially available:
>
> https://www.openmainframeproject.org
>
> I assume the goal ought to be to have something better than the
I am using IFG0EX0B to change the secondary space quantity. From my
testing, if I use IDCAMS or IBM's original IEBGENER I get the change. But,
if I use DFSORT's ICEGENER or use DFSORT, I do not get the change. I used
IBM's sample as my starting point.
Not knowing how to test/trace this module,
On Tue, Jul 7, 2020 at 10:33 AM Seymour J Metz wrote:
> Indeed, but data centers have also been taken down by events that were
> unlikely. Even paranoids have real enemies when it comes to backup
> strategies.
>
Surely we all remember when this list was down due to a "suicide squarrel"
attack
I've submitted a new RFE for GTF, requesting that the GTF PI/PGM record
and formatting be updated to include 64-bit general registers and access
registers.
At present, you don't get 64-bit register contents even when running
AMODE 64, and you don't get access register contents even if running
The biggest whomp I heard about was at Midwestern data-center. Highway
department dropped a load of ammonium nitrate to widen the Interstate. Over the
weekend lightning hit the trailer and kaboom-ed 32k lbs. It was about halfway
between primary and secondary data centers. Knocked out the
Indeed, but data centers have also been taken down by events that were
unlikely. Even paranoids have real enemies when it comes to backup strategies.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List
I think I can find uses for such a function, so I'll vote yes.
Peter
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Seymour J Metz
Sent: Monday, July 6, 2020 8:02 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Any interest in PSD I/O for REXX?
Long ago in a galaxy far
In Houston, Texas, a hurricane is VERY likely.
Joe
On Tue, Jul 7, 2020 at 10:27 AM Seymour J Metz wrote:
> A terrorist attack is unlikely.
>
> An earthquake is unlikely.
>
> A tornado is unlikely.
>
> A flood is unlikely.
>
> ...
>
> The more unlikely risks there are, the greater the odds that
A terrorist attack is unlikely.
An earthquake is unlikely.
A tornado is unlikely.
A flood is unlikely.
...
The more unlikely risks there are, the greater the odds that one of them will
happen. If you don't have off site backups then your data are at risk, and when
the balloon goes up it
Settle down, R.S. I was agreeing with you, and I certainly wasn't putting
words in your mouth.
TS7740 definitely wasn't "cheap." Obviously it was flawed.
I _think_ our TS7760s are described as RAID-S. I forget how that differs from
RAID-6, though I know it's supposed to tolerate more than
DDNAME not found
? show ddns 26142
JOB 26142 TECHDELD PRT LOCAL PUN LOCAL
PN DD-IDENT TYPE LRECL COUNT CPY FORM DEST DISP
Job record count=
W dniu 07.07.2020 o 16:52, Edward Finnell pisze:
1200lbs Semtex make you realize what backups are for and where is your cold
site?
In a message dated 7/7/2020 9:37:20 AM Central Standard Time,
rwjack...@firsthorizon.com writes:
R.S. is spot on: make backups. Because of the trauma from this
1200lbs Semtex make you realize what backups are for and where is your cold
site?
In a message dated 7/7/2020 9:37:20 AM Central Standard Time,
rwjack...@firsthorizon.com writes:
R.S. is spot on: make backups. Because of the trauma from this one event, we
now have a three-way VTS grid,
Disclaimer: I HAVE NEVER SAID THAT.
RAID is fallible. Everything is fallible.
I used RAID rhetorically, just as example of "pretty good".
And even then I urged to make backups.
Few words about RAID:
RAID is more reliable than single disk. Assuming same reliablity of disk
used in RAID.
RAID is
Gil,
Re: Key repos.
As I mentioned earlier, if you use an ssh-agent (*nix) or PAGENT-compatible
program (windoze), then you will have your unlocked keystore available to
most any ssh/sftp client application on your desktop.
For example: I use the KeePass password safe with the KeeAgent plugin on
On Tue, Jul 7, 2020 at 9:05 AM Joe Monk wrote:
> Most ORGs are abandoning RAID-5 in favor of better like RAID-6. Any DASD
> array should be engineered with two hot spares and call home service to the
> vendor for drive replacement.
>
I agree. But our z/OS DASD is a very old 2105(?) which I
Hi KB, IBM-MAIN is great. There are shops that are all primary disk. Just
make sure that you are aware of all of the considerations before going down
that route. (The ones that I'm aware of are still HSM users to take advantage
of ML1, class transitions, and backup). A few responses to your
On Tue, 7 Jul 2020 08:57:32 -0500, Kirk Wolf wrote:
>Pick one TN3270 emulator for everyone, and then we'll know you're serious.
>
You're missing the point. What benefit is there in each product's
having its own idea of where the key files are? (Or its own fonts?
Someone asked lately how to
Rocket have a web based TN3270 emulator which is quite good
https://www.rocketsoftware.com/products/rocket-bluezonepassport-terminal-emulator/rocket-bluezone-web.
It's a Node.js application so can run on your PC. I have tried it and
it's decent WRT keyboard mapping and terminal emulation.
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
John McKown
Sent: Tuesday, July 7, 2020 8:58 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [External] Re: Storage & tape question
On Tue, Jul 7, 2020 at 8:19 AM Jackson, Rob
wrote:
> Fun little note on RAID: it is
Most ORGs are abandoning RAID-5 in favor of better like RAID-6. Any DASD
array should be engineered with two hot spares and call home service to the
vendor for drive replacement.
Joe
On Tue, Jul 7, 2020 at 8:58 AM John McKown
wrote:
> On Tue, Jul 7, 2020 at 8:19 AM Jackson, Rob
> wrote:
>
> >
A very good point. In all of our storage products that we produce (dasd and
vtl) we use Raid 6 which can tolerate 2 drive failures and always have at least
1 hot spare that is inserted into the array automatically. Additionally, our
online diagnostics send out an alert email indicating a
On Tue, 7 Jul 2020 12:52:02 +, Pommier, Rex wrote:
>
>On Mon, 6 Jul 2020 16:12:59 -0600, Grant Taylor wrote:
>
>>On 7/6/20 10:41 AM, Allan Staller wrote:
>>> Until fairly recently,, there was no native ssh client on Windoze.
>> ...
>>Microsoft started distributing OpenSSH recently.,
>
>I hope
On Tue, Jul 7, 2020 at 8:19 AM Jackson, Rob
wrote:
> Fun little note on RAID: it is fallible. The last Sunday of October 2016
> I got a call bright and early because our VTS (TS7740) had shut down.
> Turns out we had a "cache" HDD failure at around 4 AM, and then a second
> one failed at
Pick one TN3270 emulator for everyone, and then we'll know you're serious.
On Mon, Jul 6, 2020 at 5:57 PM Paul Gilmartin <
000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
> On Mon, 6 Jul 2020 16:12:59 -0600, Grant Taylor wrote:
>
> >On 7/6/20 10:41 AM, Allan Staller wrote:
> >> Until
Fun little note on RAID: it is fallible. The last Sunday of October 2016 I
got a call bright and early because our VTS (TS7740) had shut down. Turns out
we had a "cache" HDD failure at around 4 AM, and then a second one failed at
around 7 AM, before the first one had been rebuilt on a spare.
-Original Message-
From: IBM Mainframe Discussion List On Behalf Of
Paul Gilmartin
Sent: Monday, July 6, 2020 5:57 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: [External] Re: Using SSH and SFTP from Windows to z/OS using
authorized_keys ???
On Mon, 6 Jul 2020 16:12:59 -0600, Grant Taylor
On Mon, 6 Jul 2020 14:55:39 -0500, Scott Fagen wrote:
With a great deal of online help from Steve Smith and Alex Brodsky, they
(independently) discovered that "above" the displayed code (generated within my
prolog), I had a DS statement that had a variable duplication factor that
relied on a
What happens if you do show sysout/ddnames and show sysout/ddnames all?
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Me too.
Joe
On Tue, Jul 7, 2020 at 6:56 AM John S. Giltner, Jr.
wrote:
> I've reached out to SSI and asked about this.
>
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I've reached out to SSI and asked about this.
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>Some powers that be have decided not to allow basic
>authentication anymore, even over HTTPS. So I am
>looking for an alternative.
Have those "powers that be" offered a list of acceptable alternatives?
Unless they insist, I don't think NTLM over HTTP is a good protocol idea
nowadays for a
On Mon, 6 Jul 2020 09:24:36 -0600, Grant Taylor
wrote:
>
>You might want to try this on a stock version of Apache, probably on a
>Linux (virtual) machine somewhere.
Ha, but the more stock versions of Apache run on Windows or Linux and typically
come with a pre-compiled module that one just
Just curious: how big is the user base of SuperWylbur?
And how many of them treat it as more like a hobby?
--
Radoslaw Skorupka
Lodz, Poland
==
Jeśli nie jesteś adresatem tej wiadomości:
- powiadom nas o tym w mailu
It it feasible. However using PS files on tape you loose many DFSMS
facilities including backup, MC features (when to delete, how many
backup versions), replication is possible, but it's not DASD remote copy
(and no consistency between VTS and DASD), etc.
Also no sharing for input. And many
W dniu 07.07.2020 o 07:28, Timothy Sipples pisze:
Radoslaw Skorupka wrote:
I forgot something obvious for me: NEVER USE TAPES FOR APPLICATION
DATA. No jobs should write or read tapes.
Nothing except backup and restore and (optionally) ML2. Managed by
HSM or FDR. Some excepions for archive
Hi RS,
"Even the biggest, cheapest and really huge DASD will not protect you
form human and application (and other) errors. But backup will do it."
Don't understand why 'offline' backup is considered a difficulty when going
all-DASD.
Keeping synchronous replication aside, PiT/snapshots are
I'm of the opposite opinion.
Virtual tapes should be used for most large sequential datasets.
Only exceptions are datasets that are required to be read by multiple
subsequent jobs at the same time.
No B37 ABENDs ever, lower cost and much more easily recovered if something
gets "accidently"
Yes, it is possible to have VTS without real tapes on backend. Some
vendors do offer only "tapeless tapes", with no option to connect real
tape library.
However from OS point of view there is difference between disk (DASD)
and tape (offline storage).
Price difference is also worth to consider,
On IBM TS7700 R4 the maximum quantity of feature #5268, 100 MBps
Throughput, is increased to 39 when 16 Gbps FICON adapter features #3402 or
#3403 are installed.
So throughput will max out at 4,000 MBps.
On Mon, 6 Jul 2020 at 22:58, Jackson, Rob
wrote:
> We have a three-way TS7760 grid--all
Hi Scott,
It would be useful to see a more complete C snippet. IIRC, I've seen
this before where the __asm("":DS()) was not declared outside of the
main function.
On 2020-07-07 12:51 AM, Scott Fagen wrote:
I have a Metal C program where I am trying to add some static data via an
__asm(“…”
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