Last week, some users encountered a SCSI bus parity error. This issue can occur due to a number of factors. We will discuss this below.
PC problems? Solve them in minutes.
SCSI DATA IN Bus Phase Parity Error
The most common cause of this annoyance is unapproved hardware. SCSI devices designed for the specialized PC niche do not meet the UNIX market requirements for high I/O speeds. Other possible causes for this problem include an incorrect power supply or power interruption and fluctuations. Possible data corruptionbut highly unlikely as this equality error prevents the transfer.
Make sure all SCSI devices connected to the bus are Sun approved. Then make sure all cables are no longer than twenty feet and have experts verify that all SCSI connections are properly connected. If power surges are possible, purchase an uninterruptible power supply.
The most common cause of this unreliable problem is hardware. Some SCSI
Devices intended for the PC market definitely do not respond to high I/O speeds
UNIX for the market. Other possible causes for this problem are incorrect electrical wiring or
Termination and performance fluctuations. Data corruption is possible, but unlikely
Make sure that many of the SCSI devices in your RV are approved by Sun. So this
All test cables are no higher than 20 feet and all SCSI connections are secure
filled in correctly. In the event of power surges, invest in a great uninterrupted connection
SCSI Failure: Migration Reason “reset”
This message proves that the system sent data over the SCSI bus, but normally the data
never reached the destination because none of the SCSI buses were reset. The most common cause of this condition is a SCSI target conflict. Data corruption is possible, although unlikely, as it interferes with data transfer.
Make sure all wires and cables are less than twenty feet long and all SCSI connections
are securely terminated. . Power supply If power surgesFor solutions related to this problem, buy a surge protector or an uninterruptible power supply.
The machine’s internal file drive is usually a four SCSI target. Make sure external and secondary file drives are aligned on 1, pair or 0 and don’t conflict with each other.
Also make sure tape drives are aligned on 4 or 5 and CD tape drives should not be 6 as they conflict with each other. with friend. others or readers. If such targeting of an internal drive is considered questionable, turn off the machine, remove all external hard drives, power up fully, and watch the probe start up from the PROM. scsi-all or probe-scsi
If targeting a SCSI device is acceptable, the problem may be in the memory settings. 4 MB). . are in the lower banks, and smaller RAM (eg 1MB SIMM type chips) are typical of the upper
SPARC systems do not always support booting third-party discs,
CDs mayt generate a similar error message from an unknown vendor. Check with your CD vendor for specific configuration requirements.
Some third-party disk drives have a read-ahead cache that interacts with
Solaris device drivers. In fact, make sure that all existing cache read-ahead features are disabled.
Ars Scholae Palatinae
Recorded June 11, 2001