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Avoid needless delays in System Updates System
While installing the 10.4.11 Server and subsequent 10.4.11 security patch, I had to wait a very long time (over an hour) while the Installer was configuring the install. I peeked in on the Installer process (using lsof and Activity monitor's 'Open files and ports' feature), and found that it was searching through every directory on all mounted drives on the machine for files to update.

Our boot volume is completely separate from our multi-terabyte data storage, so this is completely unnecessary and a complete waste of time, as there are no files on the data volumes to update. On the next three servers I updated, I unmounted all data drives before installing, and the installation of both updates took just a few minutes each.

I don't recall this being an issue in past updates, but apparently, Apple wants to make sure that they don't leave any unpatched files behind. So to speed system updates, unmount your data volumes prior to installation.

[robg adds: This may only be an issue for those with huge data drives, or perhaps only with OS X Server. I haven't noticed any lengthy slowdowns on my machine, but I'll take a look at the activity the next time I install an update.]
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Avoid needless delays in System Updates
Authored by: Anonymous on Jan 04, '08 09:40:22AM

I've had had my computer hang up when configuring the installation, but only on the 10.5.1 update and I only have an 80 gig hard drive. I didn't use the lsof command, but considering the speed of more recent updates, it would seem that either the updater has a problem and shouldn't act this way, or that it only searches the files when working on a specific type of update.

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Avoid needless delays in System Updates
Authored by: asmeurer on Jan 04, '08 07:42:16PM

Hmm… Since Leopard installs updates after shutting everything else down, wouldn't external drives be unmounted. Not sure how you could check to see if they are mounted or not.

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Avoid needless delays in System Updates
Authored by: morespace54 on Jan 07, '08 08:49:04AM

on a side note...
I had this issue since 10.5 (both with System updates and some applications updates).

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