Re: Anyone here made a "TV computer"?
Dnia 2011-04-11, pon o godzinie 22:23 +0100, Luke Kenneth Casson
Leighton pisze:
> yeahhh, bottom line: i'd pick a pandaboard and use DVB dongles and
> USB-to-SATA converters. the OMAP44xx has a 4-port hub built-in so you
> will *not* be overloading one single USB channel with SATA data.
> remember to get a decent 2-head SATA drive, otherwise playback+record
> will spang the drive heads back and forth, eventually breaking
> something.
Pandaboard has just one USB Host port. Onboard you have hub with 5
ports:
- Ethernet
- two ports under ethernet
- two ports in expansion connector
Here is my pandaboard with extra hubs, keyboard and hdd connected:
hrw@panda:~$ lsusb
Bus 001 Device 007: ID 1241:1603 Belkin Keyboard
Bus 001 Device 006: ID 04fc:0c25 Sunplus Technology Co., Ltd SATALink
SPIF225A
Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
Bus 001 Device 004: ID 058f:6254 Alcor Micro Corp. USB Hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
hrw@panda:~$ lsusb -t
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-omap/3p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/5p, 480M
|__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
|__ Port 2: Dev 4, If 0, Class=hub, Driver=hub/4p, 480M
|__ Port 1: Dev 6, If 0, Class=stor., Driver=usb-storage,
480M
|__ Port 3: Dev 5, If 0, Class=hub, Driver=hub/4p, 480M
|__ Port 2: Dev 7, If 0, Class=HID, Driver=usbhid, 1.5M
|__ Port 2: Dev 7, If 1, Class=HID, Driver=usbhid, 1.5M
Also bandwidth can be a problem - my hdd gets 9MB/s only:
hrw@panda:~$ sudo hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 354 MB in 2.01 seconds = 176.20 MB/sec
Timing buffered disk reads: 28 MB in 3.06 seconds = 9.14 MB/sec
Which is strange as it was 12MB/s before.
Reply to: