This article describes error threshold default values for VTrak E-5000 series.
This table represents the old and new values:
|
|
SR 4.0.1 |
SR 4.0.2 |
|
Reassigned Block Threshold (BBM Threshold) |
1024 |
1024 |
|
Error Block Threshold (Media Patrol Threshold) |
128 |
128 |
|
Medium Error Threshold |
64 |
64 |
|
SMART |
disabled |
disabled |
|
SCSI Command Timeout Value |
30 seconds (fixed) |
10 - 60 seconds (adjustable via CLI) |
Default value changes will take effect under the following conditions:
- The controller came from the factory with the new firmware.
- A factory default restore was issued.
- Values were manually set in WebPAM, or CLI
Definitions
Reassigned Block Threshold, also called Bad Block Manager Threshold (BBM Threshold), reads the grown defect list on SAS drives (known as the “GList”). On SATA drives, the BBM reads the DDF area written to the drive by the VTrak firmware. Please note that the BBM count can only be cleared on SATA drives, and the array information must be deleted first. If the BBM threshold has been reached, PDM will begin.
PDM- Pleaserefer to http://kb.promise.com/thread/what-is-predictive-data-migration-pdm
Error Block Threshold is also called the Media Patrol Threshold. If the threshold has been reached, PDM will begin. Media Patrol Threshold isattributed to I/O errors occurring during read/write operations:
PdId: 3
OperationalStatus: OK
Alias:
PhysicalCapacity: 931.51GB ConfigurableCapacity:931.32GB
UsedCapacity: 931.32GB BlockSize:512Bytes
ConfigStatus: Array0 SeqNo1 Location:Encl1 Slot3
ModelNo: SEAGATE ST31000640SS VisibleTo: AllControllers
SerialNo: 9QJ5AM78 FirmwareVersion:0003
DriveInterface: SAS 3Gb/s Protocol:SPC-3
WWN: 5000-c500-1003-839f NumOfPorts:2
Port1Speed: 3Gb/s Port2Speed:3Gb/s
Port1SASAddress: 50-00-c5-00-10-03-83-9d
Port2SASAddress: 50-00-c5-00-10-03-83-9e
WriteCacheSupport: Yes WriteCache:Enabled
RLACacheSupport: Yes RLACache:Enabled
ReadCacheSupport: Yes ReadCache:Enabled
CmdQueuingSupport: Yes CmdQueuing:Enabled
MediumErrorThreshold: 0
Errors: 0 NonRWErrors:0
ReadErrors: 0 WriteErrors:0
DriveTemperature: 34C/93F ReferenceDriveTemperature:68C/154F
Medium Error Threshold is a global physical drive setting. The value is the number of bad blocks tolerated before the controller marks the drive as dead. The value can be set from 0 to 4294967294. The threshold only functions when the array is in an OK or Degraded state. It will not function if the array is critical or if a non-redundant RAID type (Raid 0) is used.
SMART stands for Self-Monitoring, Analysis, and Reporting Technology. If enabled, a polling interval can be assigned. SMART will report errors detected on the disk and PDM will start if the threshold has been reached.
Configuration
CLI:
BBM Threshold– (1~2048)
administrator@cli>bga -a mod -s "BBMThreshold=1024"
MediaPatrol Threshold – (1~2048)
administrator@cli>bga -a mod -s "ErrorBlock=128"
MediumError Threshold – (0~4294967294)
administrator@cli>phydrv -a mod -s "MediumErrorThreshold=64"
SMART
administrator@cli>ctrl -a mod -s "smart=disable"
NOTE: Separate from these values, a physical drive will always be marked dead if 5 command timeouts are detected within a 30 minute time period.
SCSI Command Timeout Value via CLI (SR 4.0.2 or newer):
WARNING!! Changing this parameter can cause stability problems. Lowering the value can cause premature drive set downs and increasing the value greater than 30 seconds can cause your host application to crash. We strongly recommend to leave this value at 30 seconds unless you know what you are doing.
This command (example) will set 10 second PD timeout value from the default 30-second setting:
administrator@cli>ctrl -a mod -s " PDTimeOutValue=10"
To verify the controller setting
administrator@cli>ctrl -v
Example output highlighted in red:
CtrlId: 1
Alias:
OperationalStatus: OK PowerOnTime: 8 minutes
ControllerRole: Primary ReadinessStatus: Active
LUNAffinity: Enabled LunmappingMethod: Name Based
CacheUsagePercentage: 0% DirtyCachePercentage: 0%
PartNo: F29000020000177 SerialNo: MA6D16618400010
HWRev: B1 WWN: 2100-0001-555b-41af
CmdProtocol: SCSI-3
MemType: DDR4 SDRAM (Slot 1) MemSize: 4 GB (Slot 1)
: DDR4 SDRAM (Slot 2) : 4 GB (Slot 2)
: N/A (Slot 3) : N/A (Slot 3)
: N/A (Slot 4) : N/A (Slot 4)
FlashType: Flash Memory FlashSize: 16 GB
NVRAMType: SRAM NVRAMSize: 1 MB
BootLoaderVersion: 15.27.0000.07 BootLoaderBuildDate: N/A
FirmwareVersion: 11.07.0000.12 FirmwareBuildDate: Oct 9, 2019
SoftwareVersion: 11.03.0000.57 SoftwareBuildDate: Oct 9, 2019
DiskArrayPresent: 0 OverallRAIDStatus: OK
LogDrvPresent: 0 LogDrvOnline: 0
LogDrvOffline: 0 LogDrvCritical: 0
PhyDrvPresent: 0 PhyDrvOnline: 0
PhyDrvOffline: 0 PhyDrvPFA: 0
GlobalSparePresent: 0 DedicatedSparePresent: 0
RevertibleGlobalSparePresent: 0 RevertibleDedicatedSparePresent: 0
RevertibleGlobalSpareUsed: 0 RevertibleDedicatedSpareUsed: 0
WriteThroughMode: No MaxSectorSize: 4 KB
PreferredCacheLineSize: 64 KB CacheLineSize: 64 KB
Coercion: Enabled CoercionMethod: GBTruncate
MigrationStorage: DDF CacheFlushInterval: 3 second(s)
PollInterval: 15 second(s) AdaptiveWBCache: Enabled
HostCacheFlushing: Disabled ForcedReadAhead: Enabled
ALUA: Enabled PowerSavingIdleTime: Never
PowerSavingStandbyTime: Never PowerSavingStoppedTime: Never
PerfectRebuildAvailable: 64
VAAIsupport: Disabled SSDTrimSupport: Enabled
SMART: Disabled SMARTPollingInterval: 10 minutes
SSDSmartPollInterval: 24 hour(s) SSDLifeThreshold: 10%
SSDRemainReserveBlockThreshold: 10%
QoSType: Disabled QosUpperBound: 128 MiB/s
PDTimeOutValue: 10 seconds
