hwclock 执行出现的报错信息

IBM 3850升级微码后，发现一个问题，系统时间变快了8小时。
date -s 更改后，clock -w和hwclock都报以下错，select() to /dev/rtc to wait for clock tick timed out。
重启机器后还是时间仍然没有更改过来。
在 /etc/sysconfig/clock里加了一条 CLOCKFLAGS=--directisa 再hwclock --directisa。


修改时间：
date MMDDhhmm
保存修改：
hwclock -w --directisa


在设置系统时间的时候遇到以下问题 :
hwclock --show
select() to /dev/rtc to wait for clock tick timed out
解决办法:
vi /etc/sysconfig/clock
HWCLOCKPARS=--directisa

或者在命令行:
hwclock --show --directisa (在hwclock命令中加上参数--directisa即可)

Functions:
--help        show this help
--show        read hardware clock and print result
--set         set the rtc to the time given with --date
--hctosys     set the system time from the hardware clock
--systohc     set the hardware clock to the current system time
--adjust      adjust the rtc to account for systematic drift since
                the clock was last set or adjusted
--getepoch    print out the kernel's hardware clock epoch value
--setepoch    set the kernel's hardware clock epoch value to the
                value given with --epoch
--version     print out the version of hwclock to stdout

Options:
--utc         the hardware clock is kept in coordinated universal time
--localtime   the hardware clock is kept in local time
--rtc=path    special /dev/... file to use instead of default
--directisa   access the ISA bus directly instead of /dev/rtc
--badyear     ignore rtc's year because the bios is broken
--date        specifies the time to which to set the hardware clock
--epoch=year specifies the year which is the beginning of the
                hardware clock's epoch value
--noadjfile   do not access /etc/adjtime. Requires the use of
                either --utc or --localtime