Editing IBM System/34 (section)

===Memory and storage===
The smallest S/34 had 48K of RAM and an 8.6 MB hard drive. The largest configured S/34 could support 256K of RAM and 256MB of disk space. S/34 hard drives contained a feature called "the extra cylinder," so that bad spots on the drive were detected and dynamically mapped out to good spots on the extra cylinder. Disk space on the System/34 was organized by [[Block (data storage)|blocks]] of 2560 bytes.

The System/34 supported [[memory paging]], referring to as ''swapping''.<ref>{{cite web|url=http://bitsavers.org/pdf/ibm/system34/SC21-7742-3_System_34_Concepts_and_Design_Guide_Jan82.pdf|title=System/34 Concepts and Design Guide|date=January 1982|access-date=2021-08-01|publisher=IBM}}</ref> The System/34 could either swap out entire programs, or individual segments of a program in order to free up memory for other programs to run.

One of the machine's most distinctive features was an off-line storage mechanism that utilized "{{Visible anchor|magazines}}"—boxes of 8-inch floppies that the machine could [[#Upto23|load and eject]] in a nonsequential fashion.<ref name="S34intro78" /><ref>"the diskette magazine drive can process up to 23 diskettes without manual intervention. -p.11</ref><ref>"three slots for holding individual diskettes and two slots for holding magazines of 10 individual diskettes." -p.20</ref>

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