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Archive for May, 2005

Switching to powerbook

13 May

Two weeks ago I did some thing which I didn’t think I’ll ever do. I’d always thought Apple/Mac were worse than Microsoft because they were not open enough. I thought, that if they were open, there would have been atleast 10 times more Apple users as there are today. Since I wasn’t ready to drop $$$ dollars down the drain to buy a sleek little Mac laptop I never got around actually check it out.

Well, two weeks back after I lost a laptop in a disaster, I made a choice to switch based on few logical reasoning

  • I still believe in open source
  • Microsoft is worse than Linux
  • But Linux is not fully supported on laptops I like
  • I also have problem getting support because there are 2000 different distributions out there now
  • I’ve grown out of compiling/optimizing Linux kernel every day
  • I need access to realworld office application which my organization uses (MS Office, PGP, Checkpoint VPN
  • I know Mac can do most of these…
  • OS X has a BSD backend
  • Should be fun hacking something new for a change
  • powerbooks look sexy…
  • And I badly needed a sleek very mobile 12inch laptop which would cost me big bucks anyway… so might as well pay for a better designed one instead of going with cheaper dell alternative which seems to break everyone and then
 
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Posted in apple

 

Tape library yesterday and tommorow

13 May

BackupTape technology pretty much kept up with the Moore’s Law. Here’s the history and future of current tape technology which I compiled from various sources

Type Format Vendor GB/Hr GB/Hr compressed Storage Compressed Storage Date
Travan Traven 20 Certance 3.5 7 20 10
Travan Traven 40 Certance 7 14 40 20
AIT AIT-1 HP/Sony 14 37 91 35 1996
AIT AIT-2 HP/Sony 16 43 130 50 1998
AIT AIT-3 HP/Sony 33 86 260 100 2000
AIT AIT-4 HP/Sony 200 TBD *
AIT AIT-5 HP/Sony 400 TBD *
AIT AIT-6 HP/Sony 800 2008 *
DAT DDS-4 Certance/HP/Sony 10 20 40 20
DAT DAT72 Certance/HP/Sony 12.6 25.2 72 36
DLTvs80/160 DLT vs80 HP/Quantum 11 22 80 40
DLTvs80/160 DLT vs160 HP/Quantum 29 58 160 80
DLT 1 DLT 1 HP/Quantum 10 20 80 40
DLT 4000 DLT 4000 HP/Quantum 5 10 40 20
DLT 7000 DLT 7000 HP/Quantum 18 26 70 35
DLT 8000 DLT 8000 HP/Quantum 22 44 80 40
Super DLT SDLT220 HP/Quantum 39 78 220 110
Super DLT SDLT320 HP/Quantum 54 108 320 160 2002
Super DLT SDLT600 HP/Quantum 130 260 600 300 2004
Super DLT SDLT1200 HP/Quantum 600 2005 *
Super DLT SDLT2400 HP/Quantum 1200 2007 *
LTO/Ultrium LTO-1 HP/Certance 54 108 200 100 2000
LTO/Ultrium LTO-2 HP/Certance 108 216 400 200 2003
LTO/Ultrium LTO-3 HP/Certance 400 2005 *
LTO/Ultrium LTO-4 HP/Certance 800 TBD *
Super AIT S-AIT Sony 108 180 1300 500 2003
Super AIT S-AIT2 Sony 1000 2005 *
Super AIT S-AIT3 Sony 2000 2007 *
Super AIT S-AIT4 Sony 4000 2009 *
 
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Posted in unix