[iwar] [fc:Linux.breaks.100-Petabyte.ceiling]

From: Fred Cohen (fc@all.net)
Date: 2001-11-06 19:56:23


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Date: Tue, 6 Nov 2001 19:56:23 -0800 (PST)
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Subject: [iwar] [fc:Linux.breaks.100-Petabyte.ceiling]
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Linux breaks 100-Petabyte ceiling

By Andrew Orlowski in San Francisco

Posted: 07/11/2001 at 01:19 GMT

We almost forgot to mention this, but Linux recently became the first
desktop OS to support enormously large file sizes. How large?

144 Petabytes, or 144,000,000,000,000,000 bytes. A Petabyte is roughly a
thousand Terabytes, with a Terabyte being roughly a thousand Gigabytes, of
course. 

This came up in conversation when we were chatting to Andre Hedrick, who
looks after the Linux IDE subsystem, in our story about Mount Rainier CDs
last week. Hedrick's code exploits extensions to the ATA-133 spec, which
uses 48-bit rather than 28-bit addressing. The drivers are included in the
2.4.13-ac6 kernel tree, says Andre, or alternatively you can download them
from his site. 

The 144 Petabyte figure is obtained by raising two to the power of 48, and
multiplying it by 512. A big arse number.

Some of the big enterprise vendors have claimed to support Petabyte storage
for some time, and of course BeOS has supported 18-Petabyte files for many
moons now, but the new drivers comfortably put Linux in front. We haven't
heard of applications that demand such large files, although our most recent
expense claims come pretty close. ®

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This archive was generated by hypermail 2.1.2 : 2001-12-31 20:59:59 PST