LZ4 Decompression Missing or Outdated?
Oxtie opened this issue · 7 comments
Images compressed with current version of LZ4 compression (1.9.4) fails to decode in Grub4Dos UEFI
To use lz4 compression in grub4dos, you must add the -- content size parameter
example
Lz4-9-- content size test. img test. lz4
I already added --content-size 🤔
In old version of lz4 (compiled years back on this link), decoding works normal
These are 2 current versions LZ4.exe (by original author)
lz4_win32_v1_9_4.zip
344 KB
lz4_win64_v1_9_4.zip
604 KB
edit: Tried both versions, same error
Error 25: (http://grub4dos.chenall.net/e/25)
Disk read error
with VHD, i see counter [xxxxM/xxxxxM] but for LZ4, i don't see any mapping counter
Something is very wrong or "un-optimized" in UEFI version of grub4dos. Decoding time is double of Copy speed.
image compressed with the old version of lz4.exe is read once and then, possibly read again by grub4dos (where read counter shows up afterwards)
Use lz4_win64_v1_9_4.zip, use Lz4 -9 --content-size test.img test.lz4, no problem.
map --mem /test.lz4 (hd)
chainloader (hd-1)
boot
OK!
Same error . I used (lz4_win64_v1_9_4.zip) lz4 -1 --content-size 10x64.vhd 10x64.lz4
Error 25: (http://grub4dos.chenall.net/e/25)
Disk read error
I understand, you have compressed vhd. It seems that vhd cannot be compressed anymore. He can be dynamic and can check scores.
If I use Old version of LZ4 by Chenall (http://dl.grub4dos.chenall.net/lz4_xp.7z) then, grub4dos can decompress but take double time!
maybe author updated decompression code of new version?
I use only Fix size VHD (not dynamic)