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FCO #: A0084-1

Status: inactive

Date: Jul/30/96

Keywords: 

SCSI Parity errors

Product Affected: 

SBus Single-Ended Fast/Wide SCSI Cards
        X1018A  SunSwift SBus Adapter Card
        X1063A  SWIS/S SBus Adapter Card
 
                Ultra 1 Model 170E Creator Graphics
        Systems with Fast/Wide 68-pin single-ended SCSI
        A12-UBA1-2E-032AA
        A12-UBA1-1E-064AB
        A12-UBA1-1E-128DA
        A12-UBA1-1E-256AB
        A12-UBA1-1E-064MA (US)
        A12-UBA1-1E-064MB (UK)
        A12-UBA1-1E-064MC (Europe)

                Ultra 1 Model 170E Creator 3D Graphics
        Systems with Fast/Wide 68-pin single-ended SCSI
        A12-UBA1-1F-064AB
        A12-UBA1-1F-128DB
        A12-UBA1-1F-256AB
 
                Ultra Enterprise 1 Model 170E Server
        Systems with Fast/Wide 68-pin single-ended SCSI
        A12-UBA1-9S-064EB
 
                Ultra 2 Model 1170 Desktop
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UBA1-1E-064AB
        A14-UBA1-1F-128DB
 
                Ultra 2 Model 1170 Server
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UBA1-9S-064CB
        A14-UBA1-9S-128EB
 
                Ultra 2 Model 1200 Desktop
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UCB1-1E-064AB
        A14-UCB1-1F-128DB
 
                Ultra 2 Model 1200 Server
  	Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UCB1-9S-064CB
        A14-UCB1-9S-128EB
 
                Ultra 2 Model 2170 Desktop
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UBA2-1E-064AB
        A14-UBA2-1F-128DB
        A14-UBA2-1F-256DB
 
                Ultra 2 Model 2170 Server
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UBA2-9S-128EB
 
                Ultra 2 Model 2200 Desktop
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UCB2-1E-064AB
        A14-UCB2-1E-256DB
        A14-UCB2-1F-128DB
        A14-UCB2-1F-256DB
        A14-UCB2-1F-512DB
 
                Ultra Enterprise 2 Model 2200 Server
        Systems with Fast/Wide 68-pin single-ended SCSI
        A14-UCB2-9S-512EB
 
         
 



 SPARCUltra 1 with Fast/Wide SCSI  
 SPARCUltra 2 with Fast/Wide SCSI
 SWIS/S Sbus host adapter (ISP)
 SunSwift Sbus host adapter 


PART NUMBERS AFFECTED:

 X51xxA			SPARCstorage UniPack Disk
 X52xxA			SPARCstorage UniPack Disk
 X55xxA			SPARCstorage MultiPack
 X60xxA			SPARCstorage Multi-Tape Backup
 X61xxA			SPARCstorage UniPack Tape
 X62xxA			SPARCstorage UniPack Tape


REFERENCES:

 SPARCstorage MultiPack Desktop Storage Product Brief
 SPARCstorage UniPack/MultiPack Just the Facts
 SPARCstorage MultiPack Installation (802-4427-11)
 SPARCstorage MultiPack User's Guide (802-4428-11)
 SPARCstorage MultiPack Installation Supplement (802-4429-11)
 SPARCstorage MultiPack Service Manual (802-4430-11)
 BugID:	1241366
 ECR:	ECR05071


PROBLEM DESCRIPTION:

Under some configurations involving multiple scsi devices, such
as the MultiPack and the UniPack residing on a Fast/Wide (68-pin) 
single-ended SCSI bus, the following error message may be seen.
Other failure conditions may include an inability to boot.

	WARNING: /sbus@1f,0/SUNW,fas@0,8800000/sd@2,0 (sd17):
        Error for Command: write(10)    Error Level: Retryable
        Requested Block: 2719344        Error Block: 2719344
        Vendor: SEAGATE                 Serial Number: 01305322    
        Sense Key: Aborted Command
        ASC: 0x47 (scsi parity error), ASCQ: 0x0, FRU: 0x3


CORRECTIVE ACTION:

Review the following, updated, Configuration Guidelines for Fast/Wide single-
ended SCSI busses and perform the needed re-configuration of the SCSI 
devices to comply with the Guidelines.

General Single-ended Rules - A Wide SCSI bus supports up to 
	fifteen target devices while Narrow SCSI supports seven.  
	Daisychained configurations must not exceed 6 meters total 
	bus length (including internal and external bus length).  
	Mixing Wide and Narrow devices on the same bus is allowed, 
	but special considerations and cabling are required.  

	On a Fast/Wide SCSI system connection (16-bit, 68-pin) 
	always connect the Wide devices first.  On a Fast/Narrow SCSI
	system connnection (8-bit, 50-pin) always connect the Narrow 
	devices first.

	An external terminator is required on the last external 
	Narrow device enclosure.  Most Wide external enclosures have 
	internal automatic termination; however, an external
	terminator is recommended for multi-device applications. 

MultiPack-12 - Only one MultiPack-12 subsystem is supported on any 
	SCSI bus and only on a Fast/Wide onboard host, SWIS/S or 
	SunSwift host adapter.

MultiPack-6 - Two MultiPack-6 subsystems together with up to one 
	UniPack may be daisychained on a Fast/Wide SCSI host adapter 
	(SWIS or SunSwift).  Only one MultiPack-6 together with up 
	to one UniPack may be chained on a Fast/Wide onboard host 
	port or on any Fast/Narrow SCSI bus.

2.1GB UniPack - Four 2.1GB 7200rpm UniPacks can be chained on a 
	Fast/Wide SCSI host adapter (SWIS or SunSwift) or on any 
	Fast/Narrow host port.  Only three 2.1GB UniPacks are 
	supported on a Fast/Wide onboard host port.

All Other UniPacks - Up to four UniPacks of any kind may be 
	daisychained together on any SCSI bus.  However, up to five 
	4.2GB or 1.05GB UniPacks may be chained on a Fast/Wide SCSI 
	host adapter (SWIS/S or SunSwift).

Parts Affected: 

MultiPack-6
        X5501A  8.4 Gbyte 5400 RPM SCSI-2 (2X4.2 Gbyte)
        X5502A  16.8 Gbyte 5400 RPM SCSI-2 (4X4.2 Gbyte)
        X5503A  25.2 Gbyte 5400 RPM SCSI-2 (6X4.2 Gbyte)
 
                MultiPack-12
        X5511A  4.2 Gbyte 7200 RPM SCSI-2 (2X2.1 Gbyte)
        X5512A  12.6 Gbyte 7200 RPM SCSI-2 (6X2.1 Gbyte)
        X5513A  25.2 Gbyte 7200 RPM SCSI-2 (12X2.1 Gbyte)
 
                UniPack
        X5101A  1.05 Gbyte SCSI-2 Disk Drive (68-pin to 68-pin)
        X5102A  1.05 Gbyte SCSI-2 Disk Drive (50-pin to 68-pin)
        X5103A  2.1 Gbyte 7200 RPM SCSI-2 Disk Drive (68-pin to 68-pin)
        X5104A  2.1 Gbyte 7200 RPM SCSI-2 Disk Drive (50-pin to 68-pin)
        X5203A  4.2 Gbyte 5400 RPM SCSI-2 Disk Drive (68-pin to 68-pin)
        X5204A  4.2 Gbyte 5400 RPM SCSI-2 Disk Drive (50-pin to 68-pin)
        X6201A  14 GByte 8mm Tape (68-pin to 68-pin)
        X6202A  14 GByte 8mm Tape (50-pin to 68-pin)
        X6101A  2.5 Gbyte QIC Tape (68-pin to 68-pin)
        X6102A  2.5 Gbyte QIC Tape (50-pin to 68-pin)
        X6151A  SunCD 4 (68-pin to 68-pin)
        X6152A  SunCD 4 (50-pin to 68-pin)
        X6253A  4-8 Gbyte DDS-2 Tape (68-pin to 68-pin)
        X6254A  4-8 Gbyte DDS-2 Tape (50-pin to 68-pin)
 
                MultiTape Backup
        X6271A  16-32 Gbyte 4mm DDS-2 AutoLoader (68-pin to 68-pin)
        X6272A  16-32 Gbyte 4mm DDS-2 AutoLoader (50-pin to 68-pin)
        X6051A  20-40 Gbyte DLT 4000 (68-pin to 68-pin)
        X6052A  20-40 Gbyte DLT 4000 (50-pin to 68-pin)
        X6071A  140-280 Gbyte DLT 4700 AutoLoader (with SCSI cable)

References: 

ECO WO_09493
        Bug ID: 1241366 SCSI write parity error
        Bug ID: 1248328 wide SCSI and auto terminating
	FIN# I0276-1

Issue Description: 

On some Ultra1 and Ultra2 systems with Fast/Wide single-ended SCSI
buses consisting of external devices and 2GB-7200rpm  disk drives, users 
have reported SCSI parity errors similar to the one shown below.  The
condition is seen most often when there are internal 2GB-7200rpm disk drives
and MultiPack-12 (2GB) enclosures are on the same SCSI bus.
 
SCSI Warning - write parity errors:
 
WARNING: /sbus@1f,0/SUNW,fas@0,8800000/sd@2,0 (sd17):
         Error for Command: write(10)    Error Level: Retryable
         Requested Block: 2719344        Error Block: 2719344
         Vendor: SEAGATE                 Serial Number: 01305322
         Sense Key: Aborted Command
         ASC: 0x47 (scsi parity error), ASCQ: 0x0, FRU: 0x3
 
The problem is caused by electronic signal slew in the Fast/Wide single-ended
SCSI bus.  It is aggravated by devices which have particularly fast slew rates,
like the FEPS (2.2) chip and Seagate 2GB-7200rpm disk drives.

Corrective Action: 

Upon failure on a Fast/Wide single-ended SCSI bus, the following steps may
be taken in sequence till the problem is fixed.
 
        1.  Reposition devices on the external bus or correct the
            configuration per Configuration Guidelines published in
            FIN # I0276-1 (included at bottom of this document).
 
        2.  Install an external Fast/Wide SCSI FPT 68-pin terminator 
	    (F150-2267) at the end of the SCSI bus.
 
 

--------------------------------------------------------------------------

Comments: 

The reference documentation 'SPARCstorage MultiPack Desktop Storage Product
Brief'and 'SPARCstorage UniPack/MultiPack Just the Facts' can be accessed on 
the SunWeb using a Mosaic or a Netscape browser as follows:

* Access the top level EDIST URL of http://edist.corp/

* From there, follow the hyperlink path of
	 SunService 
	  o Documentation -> FIN & FCO attachments -> FIN -> FIN_I0276-1


--------------------------------------------------------------------------
SunWeb Access: 
______________

All released FINs and FCOs can be accessed internally through the SunService 
Home Page using Netscape or Mosaic at URL:

			http://sunservice.corp

>From there, select "SunSolve Online" and click on "Advanced Search" to query
or "Browse a collection"  to browse the FIN and FCO data collections.


--------------------------------------------------------------------------
General:
________

Send questions or comments to finfco-manager@cte.corp


---------------------------------------------------------------------------

Billing Type: 

Warranty: Sun will provide parts at no charge under Warranty 
           Service. On-Site Labor Rates are based on how the
           system was initially installed.

 Contract: Sun will provide parts at no charge. On-Site Labor Rates
           are based on the type of service contract.

 Non Contract: Sun will provide parts at no charge. Installation by
               Sun is available based on the On-Site Labor Rates 
               defined in the Price List.

--------------------------------------------------------------------------
SunWeb Access: 
______________

All released FINs and FCOs can be accessed internally through the SunService 
Home Page using Netscape or Mosaic at URL:

			http://sunservice.corp

From there, select "SunSolve Online" and click on "Advanced Search" to query
or "Browse a collection"  to browse the FIN and FCO data collections.


--------------------------------------------------------------------------
General:
________

Send questions or comments to finfco-manager@cte.corp


---------------------------------------------------------------------------


From finfcomgr@cte  Thu Jun 20 12:11:40 1996
Date: Thu, 20 Jun 1996 12:16:57 -0700
To: findist@cte.Corp.Sun.COM
Subject: Approved FIN# I0276-1 (Fast/Wide-Single ended SCSI Configuration Guidelines)
From: finfco-manager@cte
Content-Length: 4715
X-Lines: 139
Status: RO

 


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FIN #: I0276-1					DATE:  20/Jun/96