2T8# egrep 'ad[0-9]|cd[0-9]' /var/run/dmesg.boot
ad4: 476940MB <WDC WD5000AAKX-001CA0 15.01H15> at ata2-master SATA300
ad8: 476940MB <SAMSUNG HD502HI 1AG01113> at ata4-master SATA300
GEOM_LABEL: Label for provider ad4s1a is ufsid/4e7f782ca629816c.
GEOM_LABEL: Label for provider ad8s1a is ufsid/4e0c922e88042c9a.
Trying to mount root from ufs:/dev/ad4s1a
GEOM_LABEL: Label for provider ad4s1a is ufsid/4e7f782ca629816c.
GEOM_LABEL: Label for provider ad8s1a is ufsid/4e0c922e88042c9a.
2T8# egrep 'ad[0-9]|cd[0-9]' /var/run/dmesg.boot
ad4: 476940MB <WDC WD5000AAKX-001CA0 15.01H15> at ata2-master SATA300
ad8: 476940MB <SAMSUNG HD502HI 1AG01113> at ata4-master SATA300
GEOM_LABEL: Label for provider ad4s1a is ufsid/4e7f782ca629816c.
GEOM_LABEL: Label for provider ad8s1a is ufsid/4e0c922e88042c9a.
Trying to mount root from ufs:/dev/ad4s1a
GEOM_LABEL: Label for provider ad4s1a is ufsid/4e7f782ca629816c.
GEOM_LABEL: Label for provider ad8s1a is ufsid/4e0c922e88042c9a.
2T8# ls /dev
acpi cuad0.init lpt0 stdout ttyvc
ad4 cuad0.lock lpt0.ctl sysmouse ttyvd
ad4s1 dcons mdctl ttyd0 ttyve
ad4s1a devctl mem ttyd0.init ttyvf
ad4s1b devstat net ttyd0.lock ufsid
ad4s1c dgdb net1 ttyp0 uhid0
ad8 dumpdev net2 ttyv0 ukbd0
ad8s1 fd net3 ttyv1 urandom
ad8s1a fido network ttyv2 usb
ad8s1b geom.ctl nfs4 ttyv3 usb0
ad8s1c io nfslock ttyv4 usb1
ata kbd0 null ttyv5 usb2
atkbd0 kbd1 pci ttyv6 usb3
audit kbd2 ppi0 ttyv7 usb4
console kbdmux0 ptyp0 ttyv8 usb5
consolectl klog random ttyv9 usb6
ctty kmem stderr ttyva xpt0
cuad0 log stdin ttyvb zero
2T8# df
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/ad4s1a 464895904 1034978 426669254 0% /
devfs 1 1 0 100% /dev
# newfs
# newfs /dev/ad8s1a
Gio01 said:thank you for help i have fixed thank you much!
The hard disk is repaired