W dniu 2012-03-28 13:58, Tommy Tsui pisze:
What I concerns are:
1. Tape still have life time, if 1TB tape damage then we need more time to
re-built or re-create it, except you implement dual copy or PPRC VTS and it
cost you more.
Tape (real one) can be duplexed. In that case you can read data just
after the tape failed. BTDT.
For large amounts of data real tape is much cheaper and more scalable
than virtual tape on disk. It is true, it has been true for years. The
only change is treshold, a definition of "large amount".
2. Tape migration is my concern, I think disk to disk migration is more
faster solution. I can't find any migration approach for B20 to TS7740 or
TS7740 to another new model, except using COPYCAT or TAPECOPY utility, read
all tapes to cache and copy back to other tape subsystem
I see no problem with migration from tape to tape, even incompatible
ones like STK and IBM. BTDT.
3. IBM Tape drives cannot read each other, TS1120, TS1130, TS1140...If a
new model comes and we need to preform another migration....copy again and
again from tape to another tape system because of new drives.....TRUE
Not true. There is some compatibility window, wider for R/O, more narrow
for Read/Write. Compatibility window of IBM is similar to STK.
--
Radoslaw Skorupka
Lodz, Poland
--
Tre tej wiadomoci moe zawiera informacje prawnie chronione Banku
przeznaczone wycznie do uytku subowego adresata. Odbiorc moe by jedynie
jej adresat z wyczeniem dostpu osób trzecich. Jeeli nie jeste adresatem
niniejszej wiadomoci lub pracownikiem upowanionym do jej przekazania
adresatowi, informujemy, e jej rozpowszechnianie, kopiowanie, rozprowadzanie
lub inne dziaanie o podobnym charakterze jest prawnie zabronione i moe by
karalne. Jeeli otrzymae t wiadomo omykowo, prosimy niezwocznie
zawiadomi nadawc wysyajc odpowied oraz trwale usun t wiadomo
wczajc w to wszelkie jej kopie wydrukowane lub zapisane na dysku.
This e-mail may contain legally privileged information of the Bank and is intended solely for business use of the addressee. This e-mail may only be received by the addressee and may not be disclosed to any third parties. If you are not the intended addressee of this e-mail or the employee authorised to forward it to the addressee, be advised that any dissemination, copying, distribution or any other similar activity is legally prohibited and may be punishable. If you received this e-mail by mistake please advise the sender immediately by using the reply facility in your e-mail software and delete permanently this e-mail including any copies of it either printed or saved to hard drive.
BRE Bank SA, 00-950 Warszawa, ul. Senatorska 18, tel. +48 (22) 829 00 00, fax
+48 (22) 829 00 33, www.brebank.pl, e-mail: [email protected]
Sd Rejonowy dla m. st. Warszawy XII Wydzia Gospodarczy Krajowego Rejestru Sdowego, nr rejestru przedsibiorców KRS 0000025237, NIP: 526-021-50-88.
Wedug stanu na dzie 01.01.2012 r. kapita zakadowy BRE Banku SA (w caoci wpacony) wynosi 168.410.984 zotych.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
