Devices and storage

From Alessandro's Wiki
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

devices in Linux

dmidecode

  • gives you a lot of information about bus and bios

I/O analisys

  • vmstat
  • iostat
  • vopstat
  • sysstat (package)
  • iotop
    • kernel "unusual" options needed
    • CONFIG_TASK_IO_ACCOUNTING: is not set when it should be.
    • CONFIG_TASK_DELAY_ACCT: is not set when it should be.
    • CONFIG_TASKSTATS: is not set when it should be.

udev

  • udev manages the /dev filesystem interacting with the kernel and its modules
  • disk conncted through udev
ls -lR /dev/disk
  • udev information dump
udevinfo -a -p /sys/block/sdb/

lshal

  • commang to list the whole Hardware Abstraction Layer
 Processor DRAM Controller'  (string)
  pci.product_id = 64  (0x40)  (int)
  pci.subsys_product_id = 64  (0x40)  (int)
  pci.subsys_vendor = 'Intel Corporation'  (string)
  pci.subsys_vendor_id = 32902  (0x8086)  (int)
  pci.vendor = 'Intel Corporation'  (string)
  pci.vendor_id = 32902  (0x8086)  (int)

Dumped 165 device(s) from the Global Device List.

hdparm

  • sets and gets information from a block device
  1. hdparm -I /dev/hda

/dev/hda: 

ATA device, with non-removable media
       Model Number:       WDC WD2500JB-00FUA0
       Serial Number:      WD-WCAEP1091941
        Firmware Revision:  15.05R15
Standards:
        Supported: 6 5 4
        Likely used: 6
Configuration:
       Logical         max     current
       cylinders       16383   65535
       heads           16      1
       sectors/track   63      63
        --
       CHS current addressable sectors:    4128705
       LBA    user addressable sectors:  268435455
       LBA48  user addressable sectors:  488397168
       device size with M = 1024*1024:      238475 MBytes
       device size with M = 1000*1000:      250059 MBytes (250 GB)
Capabilities:
       LBA, IORDY(can be disabled)
       Standby timer values: spec'd by Standard, with device specific minimum
       R/W multiple sector transfer: Max = 16  Current = 16
       Recommended acoustic management value: 128, current value: 128
       DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
            Cycle time: min=120ns recommended=120ns
       PIO: pio0 pio1 pio2 pio3 pio4
            Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
       Enabled Supported:
          *    SMART feature set
               Security Mode feature set
          *    Power Management feature set
          *    Write cache
          *    Look-ahead
          *    Host Protected Area feature set
          *    WRITE_BUFFER command
          *    READ_BUFFER command
          *    DOWNLOAD_MICROCODE
               SET_MAX security extension
          *    Automatic Acoustic Management feature set
          *    48-bit Address feature set
          *    Device Configuration Overlay feature set
          *    Mandatory FLUSH_CACHE
          *    FLUSH_CACHE_EXT
          *    SMART error logging
          *    SMART self-test
Security:
               supported
       not     enabled
       not     locked
       not     frozen
       not     expired: security count
       not     supported: enhanced erase
HW reset results:
       CBLID- above Vih
       Device num = 0 determined by the jumper
Checksum: correct

Hard disk naming

  • behind the hard disks naming, as WD3200JD, there's lot of info about the device:
http://forums.storagereview.net/index.php?showtopic=22131
Sample: WD3200JD-00KLB0
Formula: AAbbbbCD-eeFGHi

AA = WesternDigital

bbbb = Capacity in 100MB units (GBx10)

C = Cache(buffer) size and drive's purpose:
* Desktop drives: B=2MB, J=8MB, K=16MB
* Enterprise drives 7200rpm: S=8MB, Y=16MB
* Enterprise drives 10000rpm: G=8MB, A=16MB

D = Interface and some other specs:
* B=ATA, D=SATA150, S=SATA300, R=SATA150(RaidEdition2), H=SATA150(Window)

ee = Vendor code (probably):
* 00=general consumers, 01=general enterprise, 22=promotional(?),
* 07/08/11/14/23/32/40/41/50/55/56/57/58/60/75/88/98=unknown (of them 55 is pretty much used)

F = May be related to platters (needs more research)

G = ??? (needs more research)

H = Related to interface/firmware and something more (needs more research):
* A=ATA(Caviar over 100GB)/ATAandSATA(Caviar below 100GB), B=SATA(Caviar over 100GB), C=ATAandSATA(Caviar,    newer updates), A/C/R=Generation(RaptorSATA), T=LaptopDrive

i = Firmware version (probably):
* 0/1/2=larger is newer (if the preceeding letter is same).

Disktype

disktype /dev/sda
--- /dev/hda
Block device, size 372.6 GiB (400088457216 bytes)
DOS/MBR partition map
Partition 1: 372.6 GiB (400085812224 bytes, 781417602 sectors from 63, bootable)
 Type 0x83 (Linux)
 ReiserFS file system (new 3.6 format, standard journal, starts at 64 KiB)
   Volume name "scratch"
   UUID E217E2D5-0410-479E-B4C7-60116C56761E (DCE, v4)
   Volume size 372.6 GiB (400085811200 bytes, 97677200 blocks of 4 KiB)
[...]

Hddtemp

# hddtemp /dev/sd[abcd]
WARNING: Drive /dev/sda doesn't appear in the database of supported drives
WARNING: But using a common value, it reports something.
WARNING: Note that the temperature shown could be wrong.
WARNING: See --help, --debug and --drivebase options.
WARNING: And don't forget you can add your drive to hddtemp.db
/dev/sda: WDC WD3200KS-00PFB0:  42 C or  F

extend hddtemp database

* file /usr/share/hddtemp/hddtemp.db
"ST3320620AS"                                                           194 C "Seagate ST3320620AS"
"WDC WD3200KS-00PFB0"                                           194 C "Western Digital WD3200KS-00PFB0"
  • risultato
# hddtemp /dev/sd[abcd]
/dev/sda: WDC WD3200KS-00PFB0: 42 C
/dev/sdb: ST3750330AS: 36 C
/dev/sdc: WDC WD3200KS-00PFB0: 41 C
/dev/sdd: ST3750330AS: 41 C


NCQ

megarais_sas

  • controller SAS interno:

http://www.lsi.com/storage_home/products_home/internal_raid/megaraid_sas/entry_line/megaraid_sas_9240-8i/index.html#Miscellaneous 

rpm -Uvh MegaCli-8.00.29-1.i386.rpm --nodeps
rpm -Uvh Lib_Utils-1.00-08.noarch.rpm  --nodeps
  • come usarlo:

http://hwraid.le-vert.net/wiki/LSIMegaRAIDSAS

http://hwraid.le-vert.net/wiki/LSIMegaRAID

http://tools.rapidsoft.de/perc/perc-cheat-sheet.html 

/opt/MegaRAID/MegaCli/MegaCli -PdInfo -PhysDrv \[\?:1\] -aAll


  • current virtual disk:
femmes:~/megaraid# /opt/MegaRAID/MegaCli/MegaCli -LDInfo -LALL -aALL
                                     

Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name                :Virtual Disk 0
RAID Level          : Primary-1, Secondary-0, RAID Level Qualifier-0
Size                : 136.125 GB
State               : Optimal
Strip Size          : 64 KB
Number Of Drives    : 2
Span Depth          : 1
Default Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU
Access Policy       : Read/Write
Disk Cache Policy   : Disk's Default
Encryption Type     : None
  • physical disks
:~/megaraid# /opt/MegaRAID/MegaCli/MegaCli -PDList a0 
                                     
Adapter #0

Enclosure Device ID: 32
Slot Number: 0
Device Id: 0
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 136.732 GB [0x11177328 Sectors]
Non Coerced Size: 136.232 GB [0x11077328 Sectors]
Coerced Size: 136.125 GB [0x11040000 Sectors]
Firmware state: Online, Spun Up
SAS Address(0): 0x5000cca00d047fd5
SAS Address(1): 0x0
Connected Port Number: 0(path0) 
Inquiry Data: HITACHI HUS153014VLS300 A4C2JFV2GPZC            
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None 
Device Speed: Unknown 
Link Speed: Unknown 
Media Type: Hard Disk Device



Enclosure Device ID: 32
Slot Number: 1
Device Id: 1
Sequence Number: 2
Media Error Count: 0
Other Error Count: 0
Predictive Failure Count: 0
Last Predictive Failure Event Seq Number: 0
PD Type: SAS
Raw Size: 136.732 GB [0x11177328 Sectors]
Non Coerced Size: 136.232 GB [0x11077328 Sectors]
Coerced Size: 136.125 GB [0x11040000 Sectors]
Firmware state: Online, Spun Up
SAS Address(0): 0x5000cca00d04908d
SAS Address(1): 0x0
Connected Port Number: 1(path0) 
Inquiry Data: HITACHI HUS153014VLS300 A4C2JFV2HUHC            
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None 
Device Speed: Unknown 
Link Speed: Unknown 
Media Type: Hard Disk Device
  • battery status
/opt/MegaRAID/MegaCli/MegaCli -AdpBbuCmd -aALL
                                     
BBU status for Adapter: 0

BatteryType: BBU
Voltage: 4040 mV
Current: 0 mA
Temperature: 25 C
[...]
  • Find unused disks
 /opt/MegaRAID/MegaCli/MegaCli -PDList -a0 | grep -B14 Unconfigured | grep -e '^Enclosure Device ID:' -e '^Slot Number:'
Enclosure Device ID: 32
Slot Number: 2
Enclosure Device ID: 32
Slot Number: 3
  • Silence active alarm
MegaCli -AdpSetProp AlarmSilence -aALL
  • Disable alarm
MegaCli -AdpSetProp AlarmDsbl -aALL
  • Enable alarm
MegaCli -AdpSetProp AlarmEnbl -aALL
  • Create Raid 1 Volume (in femmes, creato array secondario con 2 dischi da 2TB)
MegaCli -CfgLdAdd -r1 [32:2,32:3] -a1
  • comando effettuato il 5 maggio 2011
#  /opt/MegaRAID/MegaCli/MegaCli -CfgLdAdd -r1 [32:2,32:3] -a0
                                     
Adapter 0: Created VD 1

Adapter 0: Configured the Adapter!!

Exit Code: 0x00
  • Create RAID 0, 1, 5 drive
MegaCli -CfgLdAdd -r(0|1|5) [E:S, E:S, ...] -aN
  • Create RAID 10 drive
MegaCli -CfgSpanAdd -r10 -Array0[E:S,E:S] -Array1[E:S,E:S] -aN
  • Remove drive
MegaCli -CfgLdDel -Lx -aN

HP Smart Array

  • checking arrays on the controller
$  cat /proc/driver/cciss/cciss*
cciss0: HP Smart Array P400i Controller
Board ID: 0x000000
Firmware Version: 5.26
IRQ: 1271
Logical drives: 2
Current Q depth: 0
Current # commands on controller: 0
Max Q depth since init: 31
Max # commands on controller since init: 51
Max SG entries since init: 31
Sequential access devices: 0

cciss/c0d0:       73.37GB       RAID 1(1+0)
cciss/c0d1:      146.77GB       RAID 1(1+0)
Retrieved from "https://wiki.alessandro.delgallo.net//index.php?title=Devices_and_storage&oldid=6113"