usb メモリー　読もうとしたら　(消去も)できん
こわれたのかな

[ 494.546787] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546799] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546819] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546828] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546836] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546844] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546852] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546860] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546869] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 494.546876] FAT-fs (sdb1): error, fat_get_cluster: invalid cluster chain (i_pos 235132)
[ 549.921520] ieee80211 phy1: rt2800usb_txdone: Warning - Data pending for entry 2 in queue 2
[ 565.166697] ieee80211 phy1: rt2800usb_txdone: Warning - Data pending for entry 13 in queue 2
[ 595.774033] fat_get_cluster: 830 callbacks suppressed