Storage Devices; Printer Devices; Hot-Plugging; Cabling - Sun Microsystems Sun Blade 1000 Service Manual

D.2.1

Storage Devices

Use pcfs(7fs) and udfs(7fs) with USB mass storage devices. These file systems
are platform neutral and data can be easily shared between platforms. UFS is also
supported, but requires syncing on panic. The driver currently supports syncing.
Each mass storage device has a device node called disk. Each node receives a
unique controller number. A device with multiple LUNs gets the same controller
number but different d number (/dev/[r]dsk/cXtYdZsN)
On hot-pluggable mass storage drives, /dev/[r]dsk links remain persistent.
Type devfsadm -C to remove stale links.
System Checkpoint/Resume fails if a file system is mounted.
D.2.2

Printer Devices

After plugging in the printer, type lpadmin or printmgr to configure the
printer. To find out which of /dev/printers/N is a USB printer type ls -l on
/dev/printers and find out which symbolic links point to the usbprn device.
For Lexmark printers choose "HP" as printer type in Printmgr.
D.2.3

Hot-Plugging

OpenBoot PROM at present doesn't support hot-plugging USB devices. If a user
removes the USB keyboard when the workstation is at the ok prompt, the
workstation becomes hung. If the USB keyboard is plugged into the workstation
again the OpenBoot PROM will not recognize the keyboard. You will have to
power cycle the workstation.
As a general rule, no USB device should be hot-plugged when the workstation is
at the ok prompt in OpenBoot PROM and during booting of the workstation until
a UNIX login prompt is displayed.
Unplugging an open or busy device does not remove the entries in the prtconf
file. The system prompts the user for the original device. To clear the prtconf
file entries, plug the original device into the same port, close the application and
remove the device. Until this process is completed, the port remains unusable.
After plugging in a device, check prtconf or /dev/usb before hot removing.
D.2.4

Cabling

Never use USB cable extenders that are available on the market. Always use a
hub with longer cables to connect devices.
Appendix D USB Support D-3