Origin of "partition" in storage devices

Joshua Rice rice43 at btinternet.com
Tue Feb 1 03:14:47 CST 2022


This reminds me of the swapping/paging area in Windows 95/98 (maybe 
other
versions too), which was kept in a file, and therefore might be 
scattered all
over the physical disk. (Norton disk optimizer would coalesce the 
swap/paging
area to a contiguous area of the disk.)
	Noel


Windows still uses a pagefile, even today, on NT systems.

There's several advantages to doing it that way, including balancing 
wear on a disk (especially today, with SSDs), as a dedicated swap 
partition could put undue wear on certain areas of disk. It's also much 
easier to dynamically allocate more (or less) swap space as is needed, 
which was very important in the days when RAM was expensive and very 
limited in quantity.

Of course, doing it that way has many disadvantages, not least the 
fragmentation issue (which was the root cause of much periodic slowdown 
on Windows machines in the mid 00's), but also the overheads involved 
with transferring rather scattered and unorganised RAM contents into 
nice, neat blocks understood by the filesystem. Though i have no numbers 
to back up my claims, i'm sure the overheads involved in translating RAM 
contents to a file was much more significant than just dumping the RAM 
contents into a SWAP partition.

Josh Rice




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