W dniu 05.07.2020 o 14:12, kekronbekron pisze:
Hello List,
Just wondering ... assuming there's a primary storage product out there that
can store how-many-ever hoo-haa-bytes, and is a good product in general, it
should make sense to begin eliminating all tape (3490/3590) use right?
First, ML1 & ML2 in HSM, then HSM itself, then rebuild jobs to write to disk,
or do SMS/ACS updates to make it all disk reads/writes.
Looking at the current storage solutions out there, this is possible, right?
What would be the drawbacks (assume that primary storage is super
cost-efficient, so there's no need to archive anything).
Few remarks:
Even the cheapest possible DASD will not replace backup and other things
(archive copy, etc.)
I did replace 3490E tapes with really cheap second hand DASD boxes, it
was approx. 20 years ago. Been There, done that. It wasn't very fine
solution, it was cheap and working. AFAIR HSM does not like DASD as the
output for some activities, can't remember details.
Someone wrote about tapes moved to DR shelter. That's very
old-fashioned. I would strongly prefer to have remote copy, that means
two dasd-boxes and connectivity between.
There are products for tape emulation on CKD disk. It is definitely no
cheap. It also consume MSU.
Tapes, even virtual tapes are OFFLINE media from MVS point of view.
Offline media are good for some oooops! mistakes.
Last, but not least: you assumption is far from reality. DASD is still
more expensive than tape. The more capacity the difference is bigger.
Tape (real one) is cheap when talking about carts and very well
scalable. However tape realm with "first cart" is extremely expensive,
because drives are expensive, controllers are expensive and ATLs are
expensive.
The real decision depends strongly on your capacity, your predicted
growths, your needs and budget.
--
Radoslaw Skorupka
Lodz, Poland
======================================================================
Jeśli nie jesteś adresatem tej wiadomości:
- powiadom nas o tym w mailu zwrotnym (dziękujemy!),
- usuń trwale tę wiadomość (i wszystkie kopie, które wydrukowałeś lub zapisałeś
na dysku).
Wiadomość ta może zawierać chronione prawem informacje, które może wykorzystać
tylko adresat.Przypominamy, że każdy, kto rozpowszechnia (kopiuje, rozprowadza)
tę wiadomość lub podejmuje podobne działania, narusza prawo i może podlegać
karze.
mBank S.A. z siedzibą w Warszawie, ul. Senatorska 18, 00-950
Warszawa,www.mBank.pl, e-mail: [email protected]. Sąd Rejonowy dla m. st.
Warszawy XII Wydział Gospodarczy Krajowego Rejestru Sądowego, KRS 0000025237,
NIP: 526-021-50-88. Kapitał zakładowy (opłacony w całości) według stanu na
01.01.2020 r. wynosi 169.401.468 złotych.
If you are not the addressee of this message:
- let us know by replying to this e-mail (thank you!),
- delete this message permanently (including all the copies which you have
printed out or saved).
This message may contain legally protected information, which may be used
exclusively by the addressee.Please be reminded that anyone who disseminates
(copies, distributes) this message or takes any similar action, violates the
law and may be penalised.
mBank S.A. with its registered office in Warsaw, ul. Senatorska 18, 00-950
Warszawa,www.mBank.pl, e-mail: [email protected]. District Court for the Capital
City of Warsaw, 12th Commercial Division of the National Court Register, KRS
0000025237, NIP: 526-021-50-88. Fully paid-up share capital amounting to PLN
169.401.468 as at 1 January 2020.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
