after upgrading to gentoo-sources-3.4.4 (from 3.3.*) I had some troubles to access mbr of my usb key. s939 ~ # lsusb|grep Verbatim Bus 002 Device 002: ID 18a5:0302 Verbatim, Ltd Reproducible: Always Steps to Reproduce: 1. s939 ~ # parted print /dev/sde Errore: Impossibile fare stat del device print - File o directory non esistente. Riprova/Retry/Annulla/Cancel? A s939 ~ # parted /dev/sde print Avviso: Impossibile determinare la dimensione fisica del settore per /dev/sde. Verrà utilizzata la dimensione logica (512). Errore: /dev/sde: etichetta del disco non riconosciuta Modello: Verbatim (scsi) Disco /dev/sde: -144115188075855392,00B Dimensione del settore (logica/fisica): 512B/512B Tabella delle partizioni: unknown Flag del disco: s939 ~ # fdisk -l /dev/sde print s939 ~ # sfdisk -l /dev/sde print Disco /dev/sde: 2225167883115 cilindri, 255 testine, 63 settori/traccia lseek: Argomento non valido sfdisk: errore di ricerca su /dev/sde - impossibile ricercare a 0 sfdisk: /dev/sde: tipo di tabella delle partizioni non riconosciuto sfdisk: Non si è trovata alcuna partizione print: File o directory non esistente sfdisk: cannot open print for reading at the same time, any attempt to overwrite the mbr with dd was ineffective. apparently, the mbr seems not write accessible. conversley, all other ways to use the usb key work properly.
Created attachment 318040 [details] emerge --info
Created attachment 318042 [details] dmesg log
Created attachment 318044 [details] .config
Created attachment 318046 [details] extract from /var/log/messages
sorry for the last attachment. it's a bziped file from a text/plain one. I found some troubles to send it in the simple text/plain format because it seems long too much.
same behaviour for sys-kernel/vanilla-sources-3.4.4 . sorry for logs in italian language. anyway, the following are the same outputs in english, for parted, fdisk and sfdisk: s939 ~ # LANGUAGE="CC" parted /dev/sdd print Warning: Could not determine physical sector size for /dev/sdd. Using the logical sector size (512). Error: /dev/sdd: unrecognised disk label Model: Verbatim (scsi) Disk /dev/sdd: -144115188075855392,00B Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: s939 ~ # LANGUAGE="CC" fdisk -l /dev/sdd s939 ~ # LANGUAGE="CC" sfdisk -l /dev/sdd Disk /dev/sdd: 2225167883115 cylinders, 255 heads, 63 sectors/track lseek: Invalid argument sfdisk: seek error on /dev/sdd - cannot seek to 0 sfdisk: /dev/sdd: unrecognized partition table type sfdisk: No partitions found
this issue does not affects sys-kernel/gentoo-sources-3.4.5.
Ok, great. Closing as reported that this is fixed in 3.4.5.