Pi2B Jessie 4.9.11-v7+ UPS PIco HV 1.0 hwclock

pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl() to /dev/rtc to turn on update interrupts failed unexpectedly: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
Fri 31 Dec 1999 06:06:16 PM CST  -0.060262 seconds
pi@raspberrypi:~ $ sudo hwclock -w
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Input/output error
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $ sudo hwclock -r
hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument
pi@raspberrypi:~ $