Quote:
Correct. That has been so for as long as i can remember, and sometimes can lead to pretty awkward conversations trying to solve pendrive boot problems as well

I changed the name of my usb stick from "AROS" to "8GB" and now it works... It seems the name can not be the same as the name of HD installations disk name... :)

Here's the serial log with different name on the stick:

FATFS: opening libraries.
\0x09FS task: 5ac6950, port 5ac69b0

\0x09Device successfully opened
Probe_64bit_support: device supports 64-bit trackdisk extensions
\0x09Disk change interrupt handler installed
\0x09Initiated device: USBSCSI0P0
[fat] returning startup packet
Handler init finished.

Got disk change request
\0x09Disk has been inserted
[fat] reading boot sector
[fat] boot sector at sector 2048
\0x09Boot sector:
\0x09SectorSize = 512
\0x09SectorSize Bits = 9
\0x09SectorsPerCluster = 8
\0x09ClusterSize = 4096
\0x09ClusterSize Bits = 12
\0x09Cluster Sectors Bits = 3
\0x09First FAT Sector = 32
\0x09Number of FATs = 2
\0x09FAT Size = 15065
\0x09Total Sectors = 15456256
\0x09RootDir Sectors = 0
\0x09Data Sectors = 15426094
\0x09Clusters Count = 1928261
\0x09First RootDir Sector = 30162
\0x09First Data Sector = 30162
\0x09FAT32 filesystem detected
[fat] rootdir at cluster 2 sector 0
[fat] searching root directory for volume name
[fat] initialised dir handle, first cluster is 2, first sector is 0
[fat] looking for dir entry 0 in dir starting at cluster 2
[fat] trying to read 32 bytes (0 sectors + 0 bytes into the file)
[fat] moving forward 0 clusters from cluster 2
[fat] moved to cluster 2
[fat] chunk starts 0 sectors into the cluster, which is sector 30162
[fat] requesting sector 30162 from cache
[fat] dump of last read, 32 bytes:
0x000000 38 47 42 20 20 20 20 20 20 20 20 08 00 00 10 68 8GB ....h
0x000010 ad 46 ad 46 00 00 10 68 ad 46 00 00 00 00 00 00 .F.F...h.F......
[fat] copied 32 bytes, want 0 more
[fat] found volume id entry 0
[fat] converting fat date: year 35 month 5 day 13 hours 13 mins 0 secs 16
[fat] converted fat date: days 13646 minutes 780 ticks 1600
[fat] volume name is '8gb'
[fat] releasing dir handle (cluster 2)
[fat] valid FATFSInfo block found
\0x09FAT Filesystem successfully detected.
\0x09Free Clusters = 1928260
\0x09Next Free Cluster = 2
\0x09Creating new volume.
\0x09Disk successfully initialised
Done
[FAT] DISK_CHANGE [INTERNAL]
\0x09Volume added successfuly
Packet destroyed
[FAT] IS_FILESYSTEM
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] DISK_INFO
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] LOCATE_OBJECT: lock 0x00000000 (dir 0/0) name '' type SHARED
[fat] locking root
[fat] created root lock 0x07d4de70
[fat] global locks:
root: 1 references
(-1/-1) 8gb: 1 references
[FAT] replying to packet: result 0x7d4de70, error 0x0
[FAT] FINDINPUT: lock 0x07d4de70 (dir -1/-1) path 'Disk.info'
[fat] opening file 'Disk.info' in dir at cluster 0, action FINDINPUT
[fat] trying to obtain lock on 'Disk.info' in dir at cluster 0
[fat] initialised dir handle, first cluster is 2, first sector is 0
[fat] looking for entry with path 'Disk.info' from dir at cluster 2
[fat] now looking for entry with path 'Disk.info' from dir at cluster 2
[fat] remaining path is 'Disk.info' (9 bytes), current chunk is 'Disk.info' (9 bytes)
[fat] looking for dir entry with name 'Disk.info'
[fat] looking for next entry after index -1
[fat] looking for dir entry 0 in dir starting at cluster 2
[fat] trying to read 32 bytes (0 sectors + 0 bytes into the file)
[fat] moving forward 0 clusters from cluster 2
[fat] moved to cluster 2
[fat] chunk starts 0 sectors into the cluster, which is sector 30162
[fat] requesting sector 30162 from cache
[fat] dump of last read, 32 bytes:
0x000000 38 47 42 20 20 20 20 20 20 20 20 08 00 00 10 68 8GB ....h
0x000010 ad 46 ad 46 00 00 10 68 ad 46 00 00 00 00 00 00 .F.F...h.F......
[fat] copied 32 bytes, want 0 more
[fat] entry 0 is a volume name or long filename, skipping it
[fat] looking for dir entry 1 in dir starting at cluster 2
[fat] trying to read 32 bytes (0 sectors + 32 bytes into the file)
[fat] using cached sector 30162
[fat] dump of last read, 32 bytes:
0x000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0x000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[fat] copied 32 bytes, want 0 more
[fat] entry 1 is end-of-directory marker, we're done
[fat] releasing dir handle (cluster 2)
[fa
t] couldn't get lock
[fat] file not found, and not creating it
[FAT] replying to packet: result 0x0, error 0xcd
[FAT] FREE_LOCK: lock 0x07d4de70 (dir -1/-1)
[fat] freeing lock 0x07d4de70
[fat] freed associated global lock
[fat] global locks:
root: 0 references
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] LOCATE_OBJECT: lock 0x00000000 (dir 0/0) name '' type SHARED
[fat] locking root
[fat] created root lock 0x07d4de70
[fat] global locks:
root: 1 references
(-1/-1) 8gb: 1 references
[FAT] replying to packet: result 0x7d4de70, error 0x0
[FAT] EXAMINE_OBJECT: lock 0x07d4de70 (dir -1/-1)
\0x09Filling FIB data.
\0x09\0x09type: root directory
\0x09\0x09size: 0
\0x09\0x09name (len 3) 8gb
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] ACTION_PARENT: lock 0x07d4de70 (dir -1/-1)
[FAT] replying to packet: result 0x0, error 0x0
[FAT] FINDINPUT: lock 0x00000000 (dir 0/0) path ''
[fat] opening file '' in dir at cluster 0, action FINDINPUT
[fat] trying to copy passed dir lock
[fat] dir lock is a directory, which can't be opened
[FAT] replying to packet: result 0x0, error 0xd4
[FAT] LOCATE_OBJECT: lock 0x00000000 (dir 0/0) name '' type SHARED
[fat] locking root
[fat] created root lock 0x07d4dee0
[fat] global locks:
root: 2 references
(-1/-1) 8gb: 2 references
[FAT] replying to packet: result 0x7d4dee0, error 0x0
[FAT] FREE_LOCK: lock 0x07d4dee0 (dir -1/-1)
[fat] freeing lock 0x07d4dee0
[fat] global locks:
root: 1 references
(-1/-1) 8gb: 1 references
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] FREE_LOCK: lock 0x07d4de70 (dir -1/-1)
[fat] freeing lock 0x07d4de70
[fat] freed associated global lock
[fat] global locks:
root: 0 references
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] LOCATE_OBJECT: lock 0x00000000 (dir 0/0) name '' type SHARED
[fat] locking root
[fat] created root lock 0x07d4de70
[fat] global locks:
root: 1 references
(-1/-1) 8gb: 1 references
[FAT] replying to packet: result 0x7d4de70, error 0x0
[FAT] EXAMINE_OBJECT: lock 0x07d4de70 (dir -1/-1)
\0x09Filling FIB data.
\0x09\0x09type: root directory
\0x09\0x09size: 0
\0x09\0x09name (len 3) 8gb
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] ADD_NOTIFY: nr 0x079b3ff4 name '8gb:'
[fat] trying to add notification for '8gb:'
[fat] adding notify for root dir
[fat] now reporting activity on '8gb:'
[FAT] replying to packet: result 0x0, error 0x0
[FAT] FREE_LOCK: lock 0x07d4de70 (dir -1/-1)
[fat] freeing lock 0x07d4de70
[fat] freed associated global lock
[fat] global locks:
root: 0 references
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] FINDINPUT: lock 0x00000000 (dir 0/0) path '.backdrop'
[fat] opening file '.backdrop' in dir at cluster 0, action FINDINPUT
[fat] trying to obtain lock on '.backdrop' in dir at cluster 0
[fat] initialised dir handle, first cluster is 2, first sector is 0
[fat] looking for entry with path '.backdrop' from dir at cluster 2
[fat] now looking for entry with path '.backdrop' from dir at cluster 2
[fat] remaining
path is '.backdrop' (9 bytes), current chunk is '.backdrop' (9 bytes)
[fat] looking for dir entry with name '.backdrop'
[fat] looking for next entry after index -1
[fat] looking for dir entry 0 in dir starting at cluster 2
[fat] trying to read 32 bytes (0 sectors + 0 bytes into the file)
[fat] moving forward 0 clusters from cluster 2
[fat] moved to cluster 2
[fat] chunk starts 0 sectors into the cluster, which is sector 30162
[fat] requesting sector 30162 from cache
[fat] dump of last read, 32 bytes:
0x000000 38 47 42 20 20 20 20 20 20 20 20 08 00 00 10 68 8GB ....h
0x000010 ad 46 ad 46 00 00 10 68 ad 46 00 00 00 00 00 00 .F.F...h.F......
[fat] copied 32 bytes, want 0 more
[fat] entry 0 is a volume name or long filename, skipping it
[fat] looking for dir entry 1 in dir starting at cluster 2
[fat] trying to read 32 bytes (0 sectors + 32 bytes into the file)
[fat] using cached sector 30162
[fat] dump of last read, 32 bytes:
0x000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0x000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[fat] copied 32 bytes, want 0 more
[fat] entry 1 is end-of-directory marker, we're done
[fat] releasing dir handle (cluster 2)
[fat] couldn't get lock
[fat] file not found, and not creating it
[FAT] replying to packet: result 0x0, error 0xcd

Stopping drive motor

None can reproduce?

Here's the serial log with every debug option enabled in fat-handler

FATFS: opening libraries.
\0x09FS task: 7ad1630, port 7ad1690

\0x09Device successfully opened
Probe_64bit_support: device supports 64-bit trackdisk extensions
\0x09Disk change interrupt handler installed
\0x09Initiated device: USBSCSI0P0
[fat] returning startup packet
Handler init finished.

Got disk change request
\0x09Disk has been inserted
[fat] reading boot sector
[fat] boot sector at sector 2048
\0x09Boot sector:
\0x09SectorSize = 512
\0x09SectorSize Bits = 9
\0x09SectorsPerCluster = 8
\0x09ClusterSize = 4096
\0x09ClusterSize Bits = 12
\0x09Cluster Sectors Bits = 3
\0x09First FAT Sector = 32
\0x09Number of FATs = 2
\0x09FAT Size = 15065
\0x09Total Sectors = 15456256
\0x09RootDir Sectors = 0
\0x09Data Sectors = 15426094
\0x09Clusters Count = 1928261
\0x09First RootDir Sector = 30162
\0x09First Data Sector = 30162
\0x09FAT32 filesystem detected
[fat] rootdir at cluster 2 sector 0
[fat] searching root directory for volume name
[fat] initialised dir handle, first cluster is 2, first sector is 0
[fat] looking for dir entry 0 in dir starting at cluster 2
[fat] trying to read 32 bytes (0 sectors + 0 bytes into the file)
[fat] moving forward 0 clusters from cluster 2
[fat] moved to cluster 2
[fat] chunk starts 0 sectors into the cluster, which is sector 30162
[fat] requesting sector 30162 from cache
[fat] dump of last read, 32 bytes:
0x000000 41 52 4f 53 20 20 20 20 20 20 20 08 00 00 15 9b AROS .....
0x000010 ac 46 ac 46 00 00 15 9b ac 46 00 00 00 00 00 00 .F.F.....F......
[fat] copied 32 bytes, want 0 more
[fat] found volume id entry 0
[fat] converting fat date: year 35 month 5 day 12 hours 19 mins 24 secs 21
[fat] converted fat date: days 13645 minutes 1164 ticks 2100
[fat] volume name is 'Aros'
[fat] releasing dir handle (cluster 2)
[fat] valid FATFSInfo block found
\0x09FAT Filesystem successfully detected.
\0x09Free Clusters = 1928260
\0x09Next Free Cluster = 2
\0x09Found old volume.
\0x09Disk successfully initialised
Done
[FAT] IS_FILESYSTEM
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] DISK_INFO
[FAT] replying to packet: result 0xffffffff, error 0x0
[FAT] LOCATE_OBJECT: lock 0x00000000 (dir 0/0) name '' type SHARED
[fat] locking root
[MM] Pool manager error
[MM] Attempt to allocate 92 bytes
[MM] Requested to allocate from pool 0xf000eef3 which is not marked as valid

Inserting FAT32 formatted USB stick results in software failure.

Error: 0x8100000f - Memory header not located

Serial debug:
[MM] Pool manager error
[MM] Attempt to allocate 92 bytes

[MM] Requested to allocate from pool 0xf000eef3 which is not marked as valid

Inserting FAT16 formatted USB stick seems to work. It had a different name

Edit: This is with the ABIv1 (native i386)