[root@myfaun sys]# find /sys -name "persist" -print
/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-6/power/persist
/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-7/power/persist
/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-1/power/persist
/sys/devices/pci0000:00/0000:00:1d.7/usb2/power/persist
/sys/devices/pci0000:00/0000:00:1d.3/usb5/power/persist
/sys/devices/pci0000:00/0000:00:1d.2/usb4/power/persist
/sys/devices/pci0000:00/0000:00:1d.1/usb3/power/persist
/sys/devices/pci0000:00/0000:00:1d.0/usb1/power/persist

[root@myfaun guest]# find /sys -name "persist" -exec cat {} \;
1
1
1
1
1
1
1
1

[root@myfaun sys]# mount
/dev/sda3 on / type ext3 (rw,noatime)
none on /proc type proc (rw)
none on /sys type sysfs (rw)
none on /dev type ramfs (rw)
none on /proc/bus/usb type usbfs (rw)
none on /dev/pts type devpts (rw)
none on /dev/shm type tmpfs (rw)
/dev/sdb1 on /media/disk type vfat (rw,nosuid,nodev,noatime,flush,uid=1000,utf8,shortname=lower)