• Table of contents
• Example SATA
  • • Objectives
    • Prerequisites
    • Steps
      • Configure the hardware
      • Configure and mount file system
      • Run Benchmark
    • Conclusion

Example SATA¶

Objectives¶

• Connect a SATA drive to the devkit
• Create a file system on a partition
• Mount the file system
• Run a performance test

Prerequisites¶

• SATA drive. For this example, a Kingston 120GB SSDnow Kc300 drive is being used.
• SATA data cable
• SATA power cable
• SATA power supply. For this example, a PC power supply was used.

Steps¶

Configure the hardware¶

• Turn the devkit and SATA power supply off
• Connect the data cable between the devkit SATA connector (J12) and the SATA drive
• Connect the SATA power cable between the SATA drive and the SATA power supply
• Turn the SATA Power supply on
• Turn the devkit on

Configure and mount file system¶

If the drive already has a file-system, it may automatically mount when the devkit boots up. Use the mount command to see if /dev/sda1 is mounted.

root@mitysom-am57x:~# mount | grep sda
/dev/sda1 on /run/media/sda1 type ext4 (rw,relatime)

If the drive is mounted, unmount it so we can create our own file-system.

root@mitysom-am57x:~# umount /run/media/sda1/
root@mitysom-am57x:~# mkfs.ext4 /dev/sda1
mke2fs 1.44.3 (10-July-2018)
/dev/sda1 contains a ext4 file system
        last mounted on Wed Aug  2 18:15:15 2023
Proceed anyway? (y,N) y
64-bit filesystem support is not enabled.  The larger fields afforded by this feature enable full-strength checksumming.  Pass -O 64bit to rectify.
Discarding device blocks: done
Creating filesystem with 29304832 4k blocks and 7331840 inodes
Filesystem UUID: c243b869-6e91-4d19-bae4-18749eb307f4
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424, 20480000, 23887872

Allocating group tables: done
Writing inode tables: done
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done

root@mitysom-am57x:~# mount -t ext4 /dev/sda1  /run/media/sda1
[  129.208195] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
root@mitysom-am57x:~# cd /run/media/sda1
root@mitysom-am57x:/run/media/sda1# ls
lost+found

Run Benchmark¶

root@mitysom-am57x:/run/media/sda1# bonnie++ -d /run/media/sda1 -s 5G -n 0 -m MITYSOM-AM57x  -f -b -u root
Using uid:0, gid:0.
Writing intelligently...done
Rewriting...done
Reading intelligently...done
start 'em...done...done...done...
Version  1.04       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
MITYSOM-AM57x    5G           155959  73 90982  46           237749  64  5895  42
MITYSOM-AM57x,5G,,,155959,73,90982,46,,,237749,64,5894.5,42,,,,,,,,,,,,,

The rates achieved for reading and writing will depend on the type of drive being used.

Conclusion¶

In this example, a file system was created on a SATA drive and a benchmark was run to measure the performance.