Hello. My mp3 player (Explay L70) is blacklisted in unusual_devs.h:
UNUSUAL_DEV( 0x071b, 0x3203, 0x0000, 0x0000,
"RockChip",
"MP3",
US_SC_DEVICE, US_PR_DEVICE, NULL,
US_FL_NO_WP_DETECT | US_FL_MAX_SECTORS_64),
UNUSUAL_DEV( 0x071b, 0x3203, 0x0100, 0x0100,
"RockChip",
"ROCK MP3",
US_SC_DEVICE, US_PR_DEVICE, NULL,
US_FL_MAX_SECTORS_64),
If I understand correctly, this is the cause of very slow write speed. I
commented out these entries and rebuilt the kernel, now the write speed is
acceptable and I see no problems which could be fixed by
US_FL_MAX_SECTORS_64. Can I somehow disable this quirk for my device
without patching the kernel?
Bus 001 Device 027: ID 071b:3203 Domain Technologies, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x071b Domain Technologies, Inc.
idProduct 0x3203
bcdDevice 1.00
iManufacturer 1 RockChip
iProduct 2 ROCK MP3
iSerial 3 USBV1.00
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 400mA
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 0x01 EP 1 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 8 Mass Storage
bDeviceSubClass 6 SCSI
bDeviceProtocol 80 Bulk (Zip)
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
--
WBR, wRAR (ALT Linux Team)
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