Slackware монтирует не все flash-ки

Ты бы в логи заглянул, что ли... dmesg бы написовал

Некоторые флешки монтируются как sda, а некоторые -- как sda1. Возможно, это ваш случай.

Хм... если это чем-то поможет:
Linux version 2.4.29 (root@midas) (gcc version 3.3.4) #6 Thu Jan 20 16:30:37 PST 2005
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 000000000f7f0000 (usable)
BIOS-e820: 000000000f7f0000 - 000000000f7f3000 (ACPI NVS)
BIOS-e820: 000000000f7f3000 - 000000000f800000 (ACPI data)
BIOS-e820: 000000000f800000 - 0000000010000000 (reserved)
BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
247MB LOWMEM available.
On node 0 totalpages: 63472
zone(0): 4096 pages.
zone(1): 59376 pages.
zone(2): 0 pages.
Kernel command line: auto BOOT_IMAGE=Linux ro root=306
Initializing CPU#0
Detected 1102.537 MHz processor.
Console: colour VGA+ 80x25
Calibrating delay loop... 2195.45 BogoMIPS
Memory: 247924k/253888k available (1831k kernel code, 5576k reserved, 607k data, 120k init, 0k highmem)
Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
Inode cache hash table entries: 16384 (order: 5, 131072 bytes)
Mount cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer cache hash table entries: 16384 (order: 4, 65536 bytes)
Page-cache hash table entries: 65536 (order: 6, 262144 bytes)
CPU: L1 I cache: 16K, L1 D cache: 16K
CPU: L2 cache: 256K
CPU: After generic, caps: 0383fbff 00000000 00000000 00000000
CPU: Common caps: 0383fbff 00000000 00000000 00000000
CPU: Intel(R) Celeron(TM) CPU 1100MHz stepping 01
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
POSIX conformance testing by UNIFIX
mtrr: v1.40 (20010327) Richard Gooch (rgooch@atnf.csiro.au)
mtrr: detected mtrr type: Intel
PCI: PCI BIOS revision 2.10 entry at 0xfab00, last bus=1
PCI: Using configuration type 1
PCI: Probing PCI hardware
PCI: Probing PCI hardware (bus 00)
PCI: Using IRQ router VIA [1106/0686] at 00:07.0
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd

далее:

VFS: Disk quotas vdquot_6.5.1
Journalled Block Device driver loaded
pty: 512 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A
Real Time Clock Driver v1.10f
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
RAMDISK driver initialized: 16 RAM disks of 7777K size 1024 blocksize
loop: loaded (max 8 devices)
Uniform Multi-Platform E-IDE driver Revision: 7.00beta4-2.4
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: IDE controller at PCI slot 00:07.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio
ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio
hda: WDC WD200EB-00CPF0, ATA DISK drive
blk: queue c03ad460, I/O limit 4095Mb (mask 0xffffffff)
hdc: CR-487ETE, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: attached ide-disk driver.
hda: host protected area => 1
hda: 39102336 sectors (20020 MB) w/2048KiB Cache, CHS=2434/255/63, UDMA(100)
hdc: attached ide-cdrom driver.
hdc: ATAPI 52X CD-ROM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.12
Partition check:
hda: hda1 hda2 < hda5 hda6 hda7 hda8 >
SCSI subsystem driver Revision: 1.00
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2
md: linear personality registered as nr 1
md: raid0 personality registered as nr 2
md: raid1 personality registered as nr 3
md: raid5 personality registered as nr 4
raid5: measuring checksumming speed
8regs : 1824.000 MB/sec
32regs : 1051.600 MB/sec
pIII_sse : 2579.600 MB/sec
pII_mmx : 2463.200 MB/sec
p5_mmx : 2569.600 MB/sec
raid5: using function: pIII_sse (2579.600 MB/sec)
md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
LVM version 1.0.8(17/11/2003)
Initializing Cryptographic API
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 2048 buckets, 16Kbytes
TCP: Hash tables configured (established 16384 bind 32768)
Linux IP multicast router 0.06 plus PIM-SM
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
Freeing unused kernel memory: 120k freed
Adding Swap: 506008k swap-space (priority -1)
EXT3 FS 2.4-0.9.19, 19 August 2002 on ide0(3,6), internal journal

далее:

Linux agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 196M
agpgart: Detected Via Apollo PLE133 chipset
agpgart: AGP aperture is 64M @ 0xe0000000
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
kjournald starting. Commit interval 5 seconds
EXT3 FS 2.4-0.9.19, 19 August 2002 on ide0(3,1), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
kjournald starting. Commit interval 5 seconds
EXT3 FS 2.4-0.9.19, 19 August 2002 on ide0(3,7), internal journal
EXT3-fs: mounted filesystem with ordered data mode.
8139too Fast Ethernet driver 0.9.26
PCI: Found IRQ 11 for device 00:09.0
eth0: RealTek RTL8139 at 0xd007e000, 00:80:48:16:e0:b5, IRQ 11
eth0: Identified 8139 chip type 'RTL-8100B/8139D'
eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
PCI: Found IRQ 9 for device 00:07.5
PCI: Setting latency timer of device 00:07.5 to 64
usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
uhci.c: USB Universal Host Controller Interface driver v1.1
PCI: Found IRQ 11 for device 00:07.2
PCI: Sharing IRQ 11 with 00:07.3
uhci.c: USB UHCI at I/O 0xd400, IRQ 11
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
PCI: Found IRQ 11 for device 00:07.3
PCI: Sharing IRQ 11 with 00:07.2
uhci.c: USB UHCI at I/O 0xd800, IRQ 11
usb.c: new USB bus registered, assigned bus number 2
hub.c: USB hub found
hub.c: 2 ports detected
parport0: PC-style at 0x378 [PCSPP,EPP]
parport_pc: Via 686A parallel port: io=0x378
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
shpchp: shpc_init : shpc_cap_offset == 0

Нет, к сожалению не работает. Я пробовал конечно-же и так и так...

В логах же пишет вот что:

hub.c: new USB device 00:07.3-1, assigned address 13
kernel: sda: Unit Not Ready, sense:
kernel: sda: I/O error: dev 08:00, sector 0
kernel: sda: Unit Not Ready, sense:
kernel: sda: I/O error: dev 08:00, sector 0
kernel: usb.c: USB disconnect on device 00:07.3-1 address 13

есть вероятность что флешка определит себя и покажет при lsusb

https://www.redhat.com/archives/fedora-list/2004-June/msg01348.html

http://kerneltrap.org/node/3650