Custom Query (1384 matches)

Most of SCSI/SAS drives are supporting cache control, so it is possible to implement this functionality. This should help a lot for SAS drives behind the RAID - some of them turning off write cache if drive is not "native".

Tested on scsi, megaraid and cciss device types on Linux. It was found that cciss silently filtering MODE SELECT command, so actual values are not changed. On megaraid and direct connection everything works as expected.

I decided to add autoscan functionality for drives on MegaSAS controllers. Main motivation for this was that devices on such controllers having random numbers, from 0 to ~250 and it is very annoying to write smartd configuration (i used shell + MegaCli in the past). There is no ioctl documentation provided, so i did patch based on MegaCli tool behavior (with strace and LD_PRELAOD for IOCTL) and FreeBSD driver sources which contain similar code. What this patch is doing:

• In autoscan mode, if megaraid_sas_ioctl is found in /proc/devices it is trying to identify SCSI host number with megasas controllers using sysfs (/sys/class/scsi_host/hostN/proc_name). If sysfs is not mounted it scans first 16 buses. I believe that native tool do the same.
• If controller is found i am getting device list using driver ioctl and adding them to device list

Code changes:

• megaraid.h updated to include constant/structures to get drive list
• set_fd added to linux_smart_device. I need this to override is_open check in megaraid.
• -d megaraid allows to specify devices in pseudo /dev/bus/N format. We can`t easy get drive name from the bus number, and also it is possible that drive name is not exists at all (unconfigured RAID).
• Added private functions get_dev_megasas, megasas_dcmd_cmd and megasas_pd_get_list to the linux_smart_interface.
• I disabled "MegaRAID SAT layer is reportedly buggy" error. Everything was fixed after chk_cond check was added. I am unable to reproduce problem with different hardware.
• I added set_info().dev_type = strprintf("megaraid,%d", tgt) to set device number in type. Without it --scan will show just -"d megaraid" devices. Not sure if this is correct.
• scsiata.cpp - set device type as sat+<oldname> if scsidev->get_dev_type() is not "scsi".

Example:

[root@p2986890 smartmontools]# ./smartctl --scan
/dev/sda -d scsi # /dev/sda, SCSI device
/dev/bus/0 -d megaraid,5 # /dev/bus/0 [megaraid_disk_05], SCSI device
/dev/bus/0 -d megaraid,7 # /dev/bus/0 [megaraid_disk_07], SCSI device
[root@p2986890 smartmontools]# ./smartctl --scan-open
# /dev/sda -d scsi # /dev/sda, SCSI device open failed: DELL or MegaRaid controller, please try adding '-d megaraid,N'
/dev/bus/0 -d sat+megaraid,5 # /dev/bus/0 [megaraid_disk_05] [SAT], ATA device
/dev/bus/0 -d sat+megaraid,7 # /dev/bus/0 [megaraid_disk_07] [SAT], ATA device

[root@p2986890 smartmontools]# ./smartd -d 
smartd 6.1 2012-12-14 r3732M [x86_64-linux-2.6.32-279.14.1.el6.x86_64] (local build)
Copyright (C) 2002-12, Bruce Allen, Christian Franke, www.smartmontools.org

No configuration file /usr/local/etc/smartd.conf found, scanning devices
glob(3) found no matches for pattern /dev/hd[a-t]
glob(3) found no matches for pattern /dev/sd[a-c][a-z]
Device: /dev/sda, open() failed: DELL or MegaRaid controller, please try adding '-d megaraid,N'
Device: /dev/bus/0 [megaraid_disk_05], type changed from 'megaraid,5' to 'sat+megaraid,5'
Device: /dev/bus/0 [megaraid_disk_05] [SAT], opened
Device: /dev/bus/0 [megaraid_disk_05] [SAT], WDC WD1003FBYX-01Y7B1, S/N:WD-XXXX, WWN:XXXX, FW:01.01V02, 1.00 TB
Device: /dev/bus/0 [megaraid_disk_05] [SAT], found in smartd database: Western Digital RE4 Serial ATA
Device: /dev/bus/0 [megaraid_disk_05] [SAT], not capable of SMART Health Status check
Device: /dev/bus/0 [megaraid_disk_05] [SAT], is SMART capable. Adding to "monitor" list.
Device: /dev/bus/0 [megaraid_disk_07], type changed from 'megaraid,7' to 'sat+megaraid,7'
Device: /dev/bus/0 [megaraid_disk_07] [SAT], opened
Device: /dev/bus/0 [megaraid_disk_07] [SAT], WDC WD1003FBYX-01Y7B1, S/N:WD-XXXX, WWN:XXXX, FW:01.01V02, 1.00 TB
Device: /dev/bus/0 [megaraid_disk_07] [SAT], found in smartd database: Western Digital RE4 Serial ATA
Device: /dev/bus/0 [megaraid_disk_07] [SAT], not capable of SMART Health Status check
Device: /dev/bus/0 [megaraid_disk_07] [SAT], is SMART capable. Adding to "monitor" list.
Monitoring 2 ATA and 0 SCSI devices
Device: /dev/bus/0 [megaraid_disk_05] [SAT], opened ATA device
Device: /dev/bus/0 [megaraid_disk_05] [SAT], previous self-test completed without error
Device: /dev/bus/0 [megaraid_disk_07] [SAT], opened ATA device
Device: /dev/bus/0 [megaraid_disk_07] [SAT], previous self-test completed without error

The Windows Event log service does not have a message file registered when the smartd service is installed. This results in Event log messages similar to:

The description for Event ID ( 2 ) in Source ( smartd ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: smartd, 3648, Info, Device:
.\scsi1: [areca_disk#08_enc#01], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 69 to 68, Device:
.\scsi1: [areca_disk#08_enc#01], SMART Usage Attribute: 194 Temperature_Celsius changed from 31 to 32.

Registry entry keys can be added to fix this issue at

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\smartd

For my system:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\smartd]
"EventMessageFile"=hex(2):43,00,3a,00,5c,00,50,00,72,00,6f,00,67,00,72,00,61,\
  00,6d,00,20,00,46,00,69,00,6c,00,65,00,73,00,20,00,28,00,78,00,38,00,36,00,\
  29,00,5c,00,47,00,53,00,6d,00,61,00,72,00,74,00,43,00,6f,00,6e,00,74,00,72,\
  00,6f,00,6c,00,5c,00,62,00,69,00,6e,00,5c,00,73,00,79,00,73,00,6c,00,6f,00,\
  67,00,65,00,76,00,74,00,2e,00,65,00,78,00,65,00,00,00
"TypesSupported"=dword:00000007