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Created page with "=Request= {| class="wikitable" border="1" |- ! Index Word ! Description |- | 0 | Header code [0x004E0204] |- | 1 | File handle lower word |- | 2 | File handle upper word |-..."
=Request=
{| class="wikitable" border="1"
|-
! Index Word
! Description
|-
| 0
| Header code [0x004E0204]
|-
| 1
| File handle lower word
|-
| 2
| File handle upper word
|-
| 3
| Offset lower word
|-
| 4
| Offset upper word
|-
| 5
| Size of write buffer
|-
| 6
| Alignment size (always 0x00001000)
|-
| 7
| Size of hashtable
|-
| 8
| Flush flags
|-
| 9
| (size of hashtable << 8) <nowiki>|</nowiki> 6
|-
| 10
| Pointer to hashtable
|-
| 11
| (size of write buffer << 8) <nowiki>|</nowiki> 0x14
|-
| 12
| Pointer to write buffer
|}
=Response=
{| class="wikitable" border="1"
|-
! Index Word
! Description
|-
| 0
| Header code
|-
| 1
| Result code
|-
| 2
| Size written
|-
| 3
| 4
|}
The data written are stored in the write buffer. For each 0x1000-byte block written, a SHA256 hash of the block is stored in the hashtable.
It is unknown how hashing behaves if the write offset/size are not aligned to a 0x1000-byte boundary.
{| class="wikitable" border="1"
|-
! Index Word
! Description
|-
| 0
| Header code [0x004E0204]
|-
| 1
| File handle lower word
|-
| 2
| File handle upper word
|-
| 3
| Offset lower word
|-
| 4
| Offset upper word
|-
| 5
| Size of write buffer
|-
| 6
| Alignment size (always 0x00001000)
|-
| 7
| Size of hashtable
|-
| 8
| Flush flags
|-
| 9
| (size of hashtable << 8) <nowiki>|</nowiki> 6
|-
| 10
| Pointer to hashtable
|-
| 11
| (size of write buffer << 8) <nowiki>|</nowiki> 0x14
|-
| 12
| Pointer to write buffer
|}
=Response=
{| class="wikitable" border="1"
|-
! Index Word
! Description
|-
| 0
| Header code
|-
| 1
| Result code
|-
| 2
| Size written
|-
| 3
| 4
|}
The data written are stored in the write buffer. For each 0x1000-byte block written, a SHA256 hash of the block is stored in the hashtable.
It is unknown how hashing behaves if the write offset/size are not aligned to a 0x1000-byte boundary.