| 1. | Formerly, removable disk packs were common, allowing storage capacity to be expanded.
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| 2. | The same methods are used for many later disk packs.
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| 3. | The process is reversed to remove a disk pack.
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| 4. | Some racing clutches use small multi-plate disk packs that are not part of the flywheel.
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| 5. | It was introduced in 1962 using the IBM 1316 disk pack to store two million characters.
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| 6. | Turning the handle would lock the disk pack in place and free the top shell for removal.
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| 7. | To remove the disk pack, the drive would be taken off line and allowed to spin down.
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| 8. | The disk pack is covered with a clear plastic shell and a bottom cover when not in use.
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| 9. | The drives are mounted in individual drawers that are unlatched and pulled out to access the disk pack.
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| 10. | Each disk pack could record up to 5.4 minutes of NTSC video, or 4.5 minutes of PAL video.
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