Sun StorEdge 3310/3510 Array May Stop Processing I/O When More Than 2 Hosts Send SCCLI Commands.

Asset ID:	1-73-1017446.1
Update Date:	2010-08-27
Keywords:

Solution Type FAB (standard) Sure

Solution 1017446.1 : Sun StorEdge 3310/3510 Array May Stop Processing I/O When More Than 2 Hosts Send SCCLI Commands.

Related Items


Sun Storage 3510 FC Array
 Sun Storage 3310 Array

Related Categories


GCS>Sun Microsystems>Sun FAB>Standard>Reactive

PreviouslyPublishedAs
228550

Product
Sun StorageTek 3310 SCSI Array
Sun StorageTek 3510 FC Array

Bug Id
<SUNBUG: 6331390>

Impact

The in-band interface of the SE3x10 is a single-threaded interface that uses the SCSI send/receive diagnostic method for communication.

This requires a receive diagnostic command to complete the operation initiated by a send diagnostic command. While the requested operation is in process any subsequent send diagnostic commands received by the controller will be rejected with an "overlapped command" error.

When multiple sccli commands are received, a constant overlapped error condition may occur which may result in loss of I/O and application failure.

This issue occurs in sccli version 2.1.1 and firmware 4.1.3 and below:

sccli: selected device /dev/rdsk/c8t600C0FF000000000000F261B6C04F600d0s2 [SUN StorEdge 3510 SN#000F26]
sccli> version
sccli version 2.1.1
sccli>
sccli> sho inq
Vendor: SUN
Product: StorEdge 3510
Revision: 413C
Peripheral Device Type: 0xd
NVRAM Defaults: 413C 3510 S442F
Bootrecord version: 1.31H
Serial Number: 000F26
Page 80 Serial Number: 000F2600000000FFFFFFFF
Page 83 Logical Unit Device ID: 600C0FF000000000000F260000000000
Page 83 Target Device ID: 206000C0FF000F26
Page D0 Fibre Channel Address: 9F (id 44)
Page D0 Node Name: 206000C0FF000F26
Page D0 Port Name: 256000C0FFC00F26
Ethernet Address: 00:C0:FF:00:0F:26
Device Type: Primary
sccli>

Symptoms

Users may see the following messages in /var/adm/messages file:

Oct  1 05:15:38 hlr902 scsi: [ID 243001 kern.warning] WARNING: /scsi_vhci (scsi_vhci0):
Oct  1 05:15:38 hlr902  /scsi_vhci/ssd@g600c0ff0000000000823f96437aedd00 (ssd2): Command Timeout on path /pci@1d,700000/pci@1/SUNW,qlc@4/fp@0,0 (fp0)
Oct  1 05:15:38 hlr902 scsi: [ID 107833 kern.warning] WARNING: /scsi_vhci/ssd@g600c0ff0000000000823f96437aedd00 (ssd2):
Oct  1 05:15:38 hlr902  SCSI transport failed: reason 'timeout': retrying command

Users may see 100 percent busy when I/O to RAID is blocked:

hlr902# iostat -Dxc 5
extended device statistics                        cpu
device       r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b  us sy wt id
sd0          0.2    0.2    1.5    2.2  0.0  0.0   19.0   0   0   0  1  5 93
sd1          0.0    3.2    0.6  260.5  0.0  0.2   56.7   0   1
sd30         0.0    0.0    0.0    0.0  0.0  0.0    0.8   0   0
ssd2         1.0    9.8   19.7  111.0  0.0  0.1   10.4   0  10
nfs1         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
extended device statistics                        cpu
device       r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b  us sy wt id
sd0          0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0   1  2 72 25
sd1          0.0    2.4    0.0   15.6  0.0  0.0    3.1   0   1
sd30         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
ssd2         0.0  604.6    0.0    0.0  0.0  1.0    1.7   0 100
nfs1         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
extended device statistics                        cpu
device       r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b  us sy wt id
sd0          0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0   0  2 83 15
sd1          0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
sd30         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
ssd2         0.0  604.2    0.0    0.0  0.0  1.4    2.3   0 100
nfs1         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
extended device statistics                        cpu
device       r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b  us sy wt id
sd0          0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0   0  2 82 15
sd1          0.0    0.8    0.0    8.0  0.0  0.0   11.4   0   0
sd30         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
ssd2         0.0  604.2    0.0    0.0  0.0  2.0    3.3   0 100
nfs1         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
extended device statistics                        cpu
device       r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b  us sy wt id
sd0          0.0    0.2    0.0    0.4  0.0  0.0    8.0   0   0   0  2 85 13
sd1          0.0    0.2    0.0    1.6  0.0  0.0    7.8   0   0
sd30         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0
ssd2         0.0  604.2    0.0    0.0  0.0  2.0    3.3   0 100
nfs1         0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0

Root Cause

Workaround

Prior to sccli version 2.3 - build 12, limit sccli command sources to two or fewer hosts.

Resolution

Final resolution is to upgrade the sccli software to version 2.3 - build 12 or later. This software can be obtained via the following URL:

http://www.sun.com/download/products.xml?id=4436c6a0

Modification History
Date: 24-MAY-2006

BUG ID 6331390 has been fixed in sccli 2.3 - build 12. Updated FIN to reflect this new information.

Previously Published As
102348
Internal Comments
Related Information

URL: http://www.sun.com/download/products.xml?id=4436c6a0

Internal Contributor/submitter
[email protected]

Internal Eng Business Unit Group
KE Authors

Internal Eng Responsible Engineer
[email protected]

Internal Services Knowledge Engineer
[email protected]

Internal Escalation ID
1-12161170

Internal Kasp FAB Legacy ID
102348

Internal Sun Alert & FAB Admin Info
Critical Category:
Significant Change Date:
Avoidance: Workaround
Responsible Manager: null
Original Admin Info: null

Product_uuid
3db30178-43d7-4d85-8bbe-551c33040f0d|Sun StorageTek 3310 SCSI Array
58553d0e-11f4-11d7-9b05-ad24fcfd42fa|Sun StorageTek 3510 FC Array

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