On Sep 2, 2008, at 12:37 PM, Bruce Johnson wrote:
> Which is why the people doing such projects here usually rely on large > scratch drives they can reformat between projects. At a large general-purpose service bureau with whom I was formerly employed as a lead (i.e., principal) systems programmer, we "squished" (the System/370 version of a defrag) our customer- accessible drives on a periodic basis, usually several drives per evening shift. Now, this was way, way back when a large drive was 200 MB (3330-11), and a very, very large drive was 316 MB (3350). Fast-forward nearly two decades and drives were hardly larger, in real-world terms: 1 GB (3390-1), 2 GB (3390-2) and 3 GB (3390-3), and the performance of the 9 GB 3390-9 was just plain too slow for any use except long-term archiving as it spun at 1200 rpm instead of the usual 3600 rpm in order to accommodate three times the data, while maintaining the same aeriel density, yet increasing the mximum latency from 16.67 msec to 50 msec. For true "scratch" volumes, which were usually 3330-11s, these were "scratched" (i.e., initialized, thereby deleting all data) every evening. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
