Red Hat Bugzilla – Bug 246094
second mass storage device/volume not found
Last modified: 2007-11-30 17:12:08 EST
I have mp3 player with internal memory and SD card slot. Plugging the player to the USB slot shows only the internal memory as mass storage device/volume, the SD card is not detected. I'm sure this has worked some time ago (early FC6 I think) and both devices were accessible - and "other proprietary operating system" shows it right, too. dmesg shows only one device(internal memory has 512MB, SD card has 1GB): usb 5-4: new high speed USB device using ehci_hcd and address 10 usb 5-4: configuration #1 chosen from 1 choice scsi7 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 10 usb-storage: waiting for device to settle before scanning scsi 7:0:0:0: Direct-Access SigmaTel MSCNMMC 0100 PQ: 0 ANSI: 4 SCSI device sdb: 1011712 512-byte hdwr sectors (518 MB) sdb: Write Protect is off sdb: Mode Sense: 38 00 00 00 sdb: assuming drive cache: write through SCSI device sdb: 1011712 512-byte hdwr sectors (518 MB) sdb: Write Protect is off sdb: Mode Sense: 38 00 00 00 sdb: assuming drive cache: write through sdb: sdb1 sd 7:0:0:0: Attached scsi removable disk sdb sd 7:0:0:0: Attached scsi generic sg2 type 0 usb-storage: device scan complete
Can we get the USB vendor and device ID for this? Output of 'lsusb -n' should show it.
Yes, lsusb says this: Bus 005 Device 012: ID 066f:8004 SigmaTel, Inc. MSCNMMC MP3 Player
The dmesg was well captured but does not show why this happens. Pal'o, please capture me a trace from usbmon. There's a howto here: /usr/share/doc/kernel-doc-2.6.22/Documentation/usb/usbmon.txt I would like to see if the number of LUNs request is being issued correctly and what the result is. But don't truncate the trace, just attach it whole as a file. I'm assuming here that the problem continues to occur.
Sorry for reporting "the bug". But only after reading the comment #3 I tried to add a max_luns=4 option for the scsi_mod module (I have custom configured kernel without the option CONFIG_SCSI_MULTI_LUN) and it helps - now I can see the SD card too. Thanks for help.