HARDKERNEL ODROID-XU4 User Manual
Also see for ODROID-XU4: User manual
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Contents
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68 ODROID-XU4 USER MANUAL“xu4-01-raid1”. The XU4 sees the enclosure setup as just one drivecalled RAID1. Power off the entire setup and power them back up,then run the following command in order to validate the setup:$ df -hFilesystem Size Used Avail Use% Mounted onudev 746M 0 746M 0% /devtmpfs 200M 6.8M 193M 4% /run/dev/mmcblk0p2 15G 3.8G 10G 28% /tmpfs 998M 88K 998M 1% /dev/shmtmpfs 5.0M 4.0K 5.0M 1% /run/locktmpfs 998M 0 998M 0% /sys/fs/cgroup/dev/mmcblk0p1 128M 7.1M 121M 6% /media/bootcgmfs 100K 0 100K 0% /run/cgmanager/fstmpfs 200M 20K 200M 1% /run/user/1000/dev/sda1 237G 63M 225G 1% /media/odroid/xu4-01-raid1Note that the file-system entry of /dev/sda1 is the same as theentry for the HDD storage device used in the official Hardkernel dock-ing system kit described in the previous section. No two entries canactually have the same filesystem names. They are the same heresince these sections were written with only one external storage de-vice attached at a time. These kits and enclosures can used at thesame time provided that they use their own power supplies, since theXU4 cannot deliver the high power requirements through the on-boardUSB3 ports. They will have different device names if used simultane-ously.Since the RAID1 functionality is provided by the hardware in theenclosure, the disk access speeds under optimal test conditions arequite reasonable:$ sudo hdparm -t /dev/sda1/dev/sda1:Timing buffered disk reads: 296 MB in 3.01 seconds = 98.33 MB/secodroid@xu4-2:~$ sudo hdparm -T /dev/sda1/dev/sda1:Timing cached reads: 1724 MB in 2.00 seconds = 863.05 MB/secThe actual performance speeds may vary based on your setup.USB GPS ModuleHardkernel produces a 5V/0.1A GPS receiver with an USB in-terface that supports the standard National Marine Electronics Asso-ciation (NMEA) GPS protocol, as shown below. The device uses theUblox 6010 chipset, with support already built into the official Hard-kernel Ubuntu image. One should be able to attach the device to anavailable USB port on the XU4 and start using it right away.Chapter 4 |
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