Hi,
Following are the test results. Please comment up to which extent are they correct?
USB:
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root@namc-p2041:~# usb 1-1: new high speed USB device number 2 using fsl-ehci
scsi0 : usb-storage 1-1:1.0
scsi 0:0:0:0: Direct-Access freescale PMAP PQ: 0 ANSI: 0 CCS
sd 0:0:0:0: Attached scsi generic sg0 type 0
sd 0:0:0:0: [sda] 7831552 512-byte logical blocks: (4.00 GB/3.73 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] No Caching mode page present
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] No Caching mode page present
sd 0:0:0:0: [sda] Assuming drive cache: write through
sda: sda4
sd 0:0:0:0: [sda] No Caching mode page present
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] Attached SCSI removable disk
FAT-fs (sda): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
root@namc-p2041:~# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 54 MB in 3.10 seconds = 17.40 MB/sec
SATA:
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ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata2.00: ATA-8: WDC WD5000BPVT-60HXZT3, 01.01A01, max UDMA/133
ata2.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 0/32)
ata2.00: configured for UDMA/133
ata1: No Device OR PHYRDY change,Hstatus = 0xa0000000
ata1: SATA link down (SStatus 0 SControl 300)
scsi 1:0:0:0: Direct-Access ATA WDC WD5000BPVT-6 01.0 PQ: 0 ANSI: 5
sd 1:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB) sd 1:0:0:0: Attached scsi generic sg0 type 0 sd 1:0:0:0: [sda] 4096-byte physical blocks sd 1:0:0:0: [sda] Write Protect is off sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sda: sda1
sd 1:0:0:0: [sda] Attached SCSI disk
namc-p5020:~# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 225 MB in 3.12 seconds = 77 MB/sec
SD CARD:
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mmc0: new high speed SDHC card at address b368
mmcblk0: mmc0:b368 NCard 3.70 GiB
mmcblk0: p1 p2 < p5 p6 >
root@model:~# fdisk -l
Disk /dev/mmcblk0: 3973 MB, 3973054464 bytes
4 heads, 16 sectors/track, 121248 cylinders, total 7759872 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x92ef85ec
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 2048 43007 20480 83 Linux
/dev/mmcblk0p2 43008 7759871 3858432 5 Extended
/dev/mmcblk0p5 45056 6336511 3145728 83 Linux
/dev/mmcblk0p6 6338560 7387135 524288 83 Linux
root@model:~# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 3.0G 892M 2.1G 30% /
/dev/root 3.0G 892M 2.1G 30% /
none 347M 152K 347M 1% /dev
tmpfs 347M 5.3M 342M 2% /var/volatile
tmpfs 347M 0 347M 0% /media/ram
root@model:~# hdparm -t /dev/mmcblk0
/dev/mmcblk0:
Timing buffered disk reads: 62 MB in 3.08 seconds = 20.13 MB/sec
NAND:
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NAND device: Manufacturer ID: 0x2c, Chip ID: 0xf1 (Micron MT29F1G08ABADAWP) 128MB
root@model:~# hdparm -t /dev/mtdblock4
/dev/mtdblock4:
Timing buffered disk reads: 18 MB in 3.13 seconds = 5.76 MB/sec
NOR:
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root@namc-p4080:~# hdparm -t /dev/mtdblock2
/dev/mtdblock2:
Timing buffered disk reads: 12 MB in 3.05 seconds = 3.93 MB/sec
Best regards,
Adeel
It seems USB and SATA test results are much lower than our system test, but the performance data also depends on storage devices, what kind of storage devices did you use in the testing?