LOGIC 53C810A DRIVER
These configurations are not supported. Create at least a 1-cylinder DOS partition starting at cylinder 0. Changing these options is not recommended unless absolutely necessary. See the ncrs 7D man page. The sym53c8xx driver is derived from the ncr53c8xx driver, which was ported from the FreeBSD ncr 4 driver to Linux This driver offers other options that are not currently exported to the user.
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On some early PCI systems with the 53C chip on the motherboard, the interrupt pin on the chip is not connected. Previous revisions were pre-release versions of the chip, so there might still be a few in circulation. Do not attempt to connect wide targets to the narrow logoc of the cards listed as supporting narrow disks.
Ubuntu Manpage: sym — NCR/Symbios/LSI Logic 53C8XX PCI SCSI host adapter driver
Driver features include support for wide SCSI busses and fast10, fast20, fast40 and fastdt synchronous data transfers depending on controller capabilities. In these instances, the system recovers and the tape drive remains usable.
See the ncrs 7D man page. This option is supplied for convenience but it is neither recommended nor supported.
It also offers the advantage of architectural improvements available only with newer chips. Upgrading the motherboard BIOS, the add-in card, or both may prevent these conflicts. Only HVD implementations that conform with Symbios Logic recommendations can logi detected by the driver.
BUGS No 553c810a bugs. These numbers are not so much limited by design as they are considered reasonable values for current SCSI technology.
Changing these options is not recommended unless absolutely necessary. You can still use the tar command to add or extract files to or from the tape in the drive. You can suppress these warnings by disabling tagged queuing in the ncrs. This driver is configured by default for a maximum of outstanding commands per bus, 8 LUNs per target and 64 tagged tasks per LUN.
Some of these options are planned to be exported through sysctl 3 or an equivalent mechanism in a future driver releases and therefore, no compatibility is guaranteed.
If the DOS partition isn’t created, the system won’t reboot after Solaris installation. By default the driver only supports HVD for these chips. These values can be increased by changing appropriate constants in driver header files not recommended.
53c810w also provides generic SCSI features such as tagged command queueing and auto-request sense. The sym53c8xx driver is derived from the ncr53c8xx driver, which was ported from the FreeBSD ncr 4 driver to Linux This feature allows the driver to safely probe against bus mode and to set up the chip accordingly.
Thus, in this case, the sym driver 53c810q attach all 53C8XX based controllers present in the system. On some Pentium motherboards Intel NX chipset using P90 or slower processors, ncrs hangs and this message is displayed on the console: The ncrs driver supports at least Revision 4 of the 53C chipset. Create at least a 1-cylinder DOS partition starting at cylinder 0. Such a system cannot be used with Solaris software.
Symbios Logic 53C810A
This driver offers other options that are not currently exported to the user. These configurations are 53c8810a supported. By default, when both the ncr 4 and sym drivers are configured, the sym driver takes precedence over the ncr 4 driver.
On some Pentium motherboards Intel NX chipset using P90 or slower processors, ncrs hangs and this message is displayed on the console:.