DOS ain't dead

Heatshrink compressed drives? - Tamp ISO compression test (Announce)

posted by jadoxa  , Queensland, Australia, 01.02.2025, 15:33

> However, you could force all lengths and offsets to be multiples of 8 or 16, > to be able to encode the compressed length of a 2k or 4k sector in a single > byte. Hmm, so we pad compressed data to a multiple of eight, presumably that means adding an average of four bytes, then we have a byte length, for an average of five bytes per sector. Great! Well, if we make each sector 2048 bytes, then we can remove the index altogether! > > As Linux has file systems that support deduplication: how about testing > > this on BTRFS or ZFS? Considering this is for a DOS driver what a Linux FS does is irrelevant. At least, what I'm doing is for a DOS driver (SHSUCDHD). > So you might be right that the compressor state did not get reset between > sectors, as there are unrealistically many sectors compressing to a size of > zero? The compressor is reset before compressing each sector; trailing zeros are removed before compression (hence all-zero sectors being zero-length).

Complete thread:

• lDebug release 9 - ecm, 21.12.2024, 13:49 (Announce)
  • lDebug release 9 - Heatshrink compressed drives? - mceric, 21.12.2024, 16:00
    • lDebug release 9 - Heatshrink compressed drives? - ecm, 21.12.2024, 18:41
      • lDebug release 9 - Heatshrink compressed drives? - mceric, 21.12.2024, 22:55
    • lDebug release 9 - Heatshrink compressed drives? - DosWorld, 02.01.2025, 18:24
    • lDebug release 9 - Heatshrink compressed drives? - jadoxa, 29.01.2025, 08:46
      • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 30.01.2025, 02:21
        • Heatshrink compressed drives? - Tamp ISO compression test - tom, 30.01.2025, 17:36
        • Heatshrink compressed drives? - Tamp ISO compression test - jadoxa, 31.01.2025, 09:24
          • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 31.01.2025, 15:15
            • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 31.01.2025, 23:33
              • Heatshrink compressed drives? - Tamp ISO compression test - tom, 01.02.2025, 11:19
                • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 01.02.2025, 13:54
                  • Heatshrink compressed drives? - Tamp ISO compression test - jadoxa, 01.02.2025, 15:33
              • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 06.02.2025, 02:42
                • Snappy compression - ecm, 06.02.2025, 04:26
                  • Snappy compression - mceric, 08.02.2025, 01:04
                    • Snappy compression - script to build a compressed executable - ecm, 08.02.2025, 18:02
                      • Snappy compression - script to build a compressed executable - ecm, 09.02.2025, 21:38
          • Heatshrink compressed drives? - Tamp ISO compression test - tom, 31.01.2025, 17:42
      • lDebug release 9 - Heatshrink compressed drives? - Oso2k, 30.01.2025, 05:12