GuruPlug Stuff

GuruPlug Server Plus Various Notes

Power Consumption

Mode	Power
idle, no ethernet	4.8W
idle, 1.8» USB HDD, no ethernet	5.9W
cpu@100%, 1.8» USB HDD, no ethernet	7.0W
system halted, no ethernet, 1.8» USB HDD	4.3W
system halted, no ethernet, no HDD	3.2W

Disk Speed

source	target	speed	flags	remarks
shipped kernel
/dev/zero	nand	5.9 MB/s	conv=fdatasync bs=1M count=100
/dev/zero	built-in uSD	1.2 MB/s	conv=fdatasync bs=1M count=100
/dev/zero	usb hdd	18.1 MB/s	conv=fdatasync bs=1M count=100
linux-image-2.6.33.3flipflip
/dev/zero	nand	5.1 MB/s	conv=fdatasync bs=1M count=100	cpu at 100% (dd, flush-ubifs)
/dev/zero	built-in uSD	5.1 MB/s	conv=fdatasync bs=1M count=100	little CPU overhead
/dev/zero	usb hdd	17.4 MB/s	conv=fdatasync bs=1M count=100	little CPU overhead
/dev/zero	usb CF	3.6 MB/s	conv=fdatasync bs=1M count=100	little CPU overhead

E.g. dd if=/dev/zero of=/mnt/tmp/foo bs=1M count=100 conv=fdatasync

NAND Flash Layout

• MTD partitions on orion_nand

offset	size		MTD name	UBIFS name	contents
0x000000000000	0x000000100000	1MiB	u-boot	n/a	u-boot (env at offset 0x40000, size 0x20000)
0x000000100000	0x000000400000	4MiB	uImage	n/a	kernel image
0x000000500000	0x00001fb00000	507MiB	root	rootfs	root fs
total	0x000020000000	512MiB

created: 2010-05-18, updated: 2015-09-16