Charles,
Were you prepared of coronavirus? Were your company prepared for that 3
years ago? No.
Are your company prepared for terrorist attack at all datacenters at the
time? It depends on the sword being used, but generally no.
Unlikely things do happen. More unlikely things do happen. Even more
unlikely things may happen. However there is no solution which protect
against everything.
A copy on disk or tape may fail. Two copies may fail. Three copies may
fail, Four copies...
By adding copies we minimize the risk, but not zeroize it. And sometimes
other factors become important. Example: many copies inside one
building. For one copy the issue was not applicable. For three copies it
is important. Not because it is less safe than one copy, but because
safety became being limited by number of locations.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 08.07.2020 o 18:13, Charles Mills pisze:
Unlikely?
Black swans do happen. How unlikely is a world-wide pandemic that cripples
economies around the world?
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of R.S.
Sent: Wednesday, July 8, 2020 2:33 AM
To: [email protected]
Subject: Re: Storage & tape question
It has no value.
Terrorist attack is unlikely, but two terrorist attacks at the time are
more unlikely. Thousand terrorist attacks at the tima are even more
unlikely.
A bomb attack is unlikely. Large (atomic?) bomb attack is more unlikely.
When you have two datacenters and tapes in shelter off-site ...it is
still just unlikely to have coordinated attack on all the locations at
the time, and it is just unlikely to have shelters strong enough.
More data locations? Fine, more bombs.
And it is quite likely some malevolent people would know the adresses of
the locations.
If you think you can protect your data against unlikely events
(disaster, etc.)...
Or rather: if you think you know how to do it, despite of the costs -
you're simply WRONG.
There is always some level of protection. The level is not infinite and
*cannot* be inifite. It can be high. Maybe "high enough" or "reasonably
high".
Side note: there are scenarios when achieving higher level of protection
is pointless. Let's assume ticket system for metro transportation
(buses) and ...war. Or ticket system for buses in Biloxi.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
.
======================================================================
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
