Geil 256MB USB Flash Key @HK$65

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GeIL Extreme Performance Dual Channel USB Pen Drive (2005.09.20)
Purchased on 2006.06.26

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USB Hardware Information

$ dmesg

usb 1-3: new high speed USB device using ehci_hcd and address 4
usb 1-3: configuration #1 chosen from 1 choice
scsi1 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 4
usb-storage: waiting for device to settle before scanning
 Vendor:           Model: USB DISK 2.0      Rev: 1.13
 Type:   Direct-Access                      ANSI SCSI revision: 00
SCSI device sda: 503808 512-byte hdwr sectors (258 MB)
sda: Write Protect is off
sda: Mode Sense: 23 00 00 00
sda: assuming drive cache: write through
SCSI device sda: 503808 512-byte hdwr sectors (258 MB)
sda: Write Protect is off
sda: Mode Sense: 23 00 00 00
sda: assuming drive cache: write through
sda: sda1
sd 1:0:0:0: Attached scsi removable disk sda
usb-storage: device scan complete

$ lsusb -s 1:4 -v

Bus 001 Device 004: ID 13fe:1a00
Device Descriptor:
bLength                18
bDescriptorType         1
bcdUSB               2.00
bDeviceClass            0 (Defined at Interface level)
bDeviceSubClass         0
bDeviceProtocol         0
bMaxPacketSize0        64
idVendor           0x13fe
idProduct          0x1a00
bcdDevice            1.00
iManufacturer           1
iProduct                2 USB DISK 2.0
iSerial                 0
bNumConfigurations      1
Configuration Descriptor:
bLength                 9
bDescriptorType         2
wTotalLength           32
bNumInterfaces          1
bConfigurationValue     1
iConfiguration          0
bmAttributes         0x80
MaxPower              200mA
Interface Descriptor:
  bLength                 9
  bDescriptorType         4
  bInterfaceNumber        0
  bAlternateSetting       0
  bNumEndpoints           2
  bInterfaceClass         8 Mass Storage
  bInterfaceSubClass      6 SCSI
  bInterfaceProtocol     80 Bulk (Zip)
  iInterface              0
  Endpoint Descriptor:
    bLength                 7
    bDescriptorType         5
    bEndpointAddress     0x81  EP 1 IN
    bmAttributes            2
      Transfer Type            Bulk
      Synch Type               None
      Usage Type               Data
    wMaxPacketSize     0x0200  1x 512 bytes
    bInterval               0
  Endpoint Descriptor:
    bLength                 7
    bDescriptorType         5
    bEndpointAddress     0x02  EP 2 OUT
    bmAttributes            2
      Transfer Type            Bulk
      Synch Type               None
      Usage Type               Data
    wMaxPacketSize     0x0200  1x 512 bytes
    bInterval               0
Device Qualifier (for other device speed):
bLength                10
bDescriptorType         6
bcdUSB               2.00
bDeviceClass            0 (Defined at Interface level)
bDeviceSubClass         0
bDeviceProtocol         0
bMaxPacketSize0        64
bNumConfigurations      1

Disk Geometry

$ fdisk -l /dev/sda

Disk /dev/sda: 257 MB, 257949696 bytes
16 heads, 32 sectors/track, 984 cylinders
Units = cylinders of 512 * 512 = 262144 bytes

  Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1         984      251888    e  W95 FAT16 (LBA)

$ sfdisk -gG /dev/sda

/dev/sda: 984 cylinders, 16 heads, 32 sectors/track
/dev/sda: 984 cylinders, 16 heads, 32 sectors/track

(note: 256 x 1,024 x 1,024 = 268,435,456!!)

Disk Read Performance

$ time dd if=/dev/sda1 of=/tmp/TEST_GEIL256MB

503776+0 records in
503776+0 records out
257933312 bytes (258 MB) copied, 9.86463 seconds, 26.1 MB/s

real    0m9.867s
user    0m0.210s
sys     0m1.578s

$ ls -l /tmp/TEST_GEIL256MB

-rw-r--r--  1 root    root  257933312 2006-06-27 13:01 TEST_GEIL256MB

$ time dd if=/dev/sda1 of=/tmp/TEST_GEIL256MB

503776+0 records in
503776+0 records out
257933312 bytes (258 MB) copied, 9.73236 seconds, 26.5 MB/s

real    0m9.735s
user    0m0.205s
sys     0m1.570s

Disk Write Performance

$ time dd if=/tmp/TEST_GEIL256MB of=/dev/sda1

503776+0 records in
503776+0 records out
257933312 bytes (258 MB) copied, 45.8822 seconds, 5.6 MB/s

real    0m45.885s
user    0m0.158s
sys     0m1.236s

$ sync
$ time dd if=/tmp/TEST_GEIL256MB of=/dev/sda1

503776+0 records in
503776+0 records out
257933312 bytes (258 MB) copied, 45.6636 seconds, 5.6 MB/s

real    0m45.666s
user    0m0.170s
sys     0m1.333s