Determine hardware and drivers from dmesg output
Following is a brief description of some typical dmesg output required for the connectivity of a linux server to a disk array.Match the following headers with the corresponding highlighted lines from the dmesg output below.
Fusion MPT SCSI Host driver 3.01.16
The LSI 1030 controller implements the LSI Logic Fusion-MPT architecture, a multithreaded I/O algorithim that supports data transfers between host system and SCSI devices with minimal host processor intervention.
Vendor: LSILOGIC Model: 1030 IM IM Rev: 1000
The LSI153C1030 PCI-X to Dual Channel Ultra320 SCSI Multifunction Controller brings Ultra320 SCSI performance to host adapter, workstation and server designs enabling the addition of a high-performance SCSI bus to any PCI or PCI-X system.
QLogic Fibre Channel HBA Driver: 8.01.06-fo
Driver version 8.01.06.fo for the Qlogic QMC2462S HBA
QLogic QMC2462S HBA- IBM eServer BC 4Gb FC Expansion Card SFF
Qlogic SANblade QMC2462S - Dual port 4-Gbps fibre channel (FC) small form factor (SFF) expansion card for IBM bladecenter. 300,000 IOPS delivers high I/O transfer rates for storage applications.
Vendor: IBM Model: 1815 FAStT Rev: 0914
IBM 1815 is the model number for a DS4800 storage array. This dmesg entry indicates that the following SCSI device sdx is attached to the array. FAStT = Fibre Array Storage Technology
dmesg output
From the output below we can see that the scsi disk sda is a local disk and scsi disks sdb, sdc, sdd, sde, sdf are connected to a DS4800 array (Model 1815).Type the following command, dmesg
SCSI subsystem initialized
Fusion MPT base driver 3.01.16
Copyright (c) 1999-2004 LSI Logic Corporation
ACPI: PCI interrupt 0000:02:01.0[A] -> GSI 24 (level, low) -> IRQ 225
mptbase: Initiating ioc0 bringup
ioc0: 53C1030: Capabilities={Initiator}Fusion MPT SCSI Host driver 3.01.16scsi0 : ioc0: LSI53C1030, FwRev=01032933h, Ports=1, MaxQ=222, IRQ=225 Using cfq io schedulerVendor: LSILOGIC Model: 1030 IM IM Rev: 1000
Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 71020544 512-byte hdwr sectors (36363 MB) SCSI device sda: drive cache: write through sda: sda1 sda2 sda3 Attached scsi disk sda at scsi0, channel 0, id 0, lun 0 QLogic Fibre Channel HBA Driver ACPI: PCI interrupt 0000:06:01.0[A] -> GSI 49 (level, low) -> IRQ 193 qla2400 0000:06:01.0: Found an ISP2422, irq 193, iobase 0xf8818000 qla2400 0000:06:01.0: Configuring PCI space... qla2400 0000:06:01.0: Configure NVRAM parameters... qla2400 0000:06:01.0: Verifying loaded RISC code... qla2400 0000:06:01.0: Allocated (64 KB) for EFT... qla2400 0000:06:01.0: Allocated (1413 KB) for firmware dump... qla2400 0000:06:01.0: Waiting for LIP to complete... qla2400 0000:06:01.0: LOOP UP detected (4 Gbps). qla2400 0000:06:01.0: Topology - (F_Port), Host Loop address 0x0 qla020: ConfigRequired is set. scsi1 : qla2xxx qla2400 0000:06:01.0:QLogic Fibre Channel HBA Driver: 8.01.06-fo
QLogic QMC2462S - IBM eServer BC 4Gb FC Expansion Card SFF
ISP2422: PCI-X Mode 1 (133 MHz) @ 0000:06:01.0 hdma+, host#=1, fw=4.00.23 [IP]Vendor: IBM Model: 1815 FAStT Rev: 0914
Type: Direct-Access ANSI SCSI revision: 03 qla2400 0000:06:01.0: scsi(1:0:0:0): Enabled tagged queuing, queue depth 32. SCSI device sdb: 41943040 512-byte hdwr sectors (21475 MB) SCSI device sdb: drive cache: write back sdb: unknown partition table Attached scsi disk sdb at scsi1, channel 0, id 0, lun 0 Vendor: IBM Model: 1815 FAStT Rev: 0914 Type: Direct-Access ANSI SCSI revision: 03 qla2400 0000:06:01.0: scsi(1:0:0:1): Enabled tagged queuing, queue depth 32. SCSI device sdc: 41943040 512-byte hdwr sectors (21475 MB) SCSI device sdc: drive cache: write back sdc: unknown partition table Attached scsi disk sdc at scsi1, channel 0, id 0, lun 1 Vendor: IBM Model: 1815 FAStT Rev: 0914 Type: Direct-Access ANSI SCSI revision: 03 qla2400 0000:06:01.0: scsi(1:0:0:2): Enabled tagged queuing, queue depth 32. SCSI device sdd: 77594624 512-byte hdwr sectors (39728 MB) SCSI device sdd: drive cache: write back sdd: unknown partition table Attached scsi disk sdd at scsi1, channel 0, id 0, lun 2 Vendor: IBM Model: 1815 FAStT Rev: 0914 Type: Direct-Access ANSI SCSI revision: 03 qla2400 0000:06:01.0: scsi(1:0:0:3): Enabled tagged queuing, queue depth 32. SCSI device sde: 209715200 512-byte hdwr sectors (107374 MB) SCSI device sde: drive cache: write back sde: unknown partition table Attached scsi disk sde at scsi1, channel 0, id 0, lun 3 Vendor: IBM Model: 1815 FAStT Rev: 0914 Type: Direct-Access ANSI SCSI revision: 03 qla2400 0000:06:01.0: scsi(1:0:0:4): Enabled tagged queuing, queue depth 32. SCSI device sdf: 445100032 512-byte hdwr sectors (227891 MB) SCSI device sdf: drive cache: write back sdf: unknown partition table Attached scsi disk sdf at scsi1, channel 0, id 0, lun 4 ACPI: PCI interrupt 0000:06:01.1[B] -> GSI 50 (level, low) -> IRQ 201 qla2400 0000:06:01.1: Found an ISP2422, irq 201, iobase 0xf881a000 qla2400 0000:06:01.1: Configuring PCI space... qla2400 0000:06:01.1: Configure NVRAM parameters... qla2400 0000:06:01.1: Verifying loaded RISC code... qla2400 0000:06:01.1: Allocated (64 KB) for EFT... qla2400 0000:06:01.1: Allocated (1413 KB) for firmware dump... qla2400 0000:06:01.1: Waiting for LIP to complete... qla2400 0000:06:01.1: LOOP UP detected (4 Gbps). qla2400 0000:06:01.1: Topology - (F_Port), Host Loop address 0x0 qla021: ConfigRequired is set. scsi2 : qla2xxx qla2400 0000:06:01.1: QLogic Fibre Channel HBA Driver: 8.01.06-fo QLogic QMC2462S - IBM eServer BC 4Gb FC Expansion Card SFF ISP2422: PCI-X Mode 1 (133 MHz) @ 0000:06:01.1 hdma+, host#=2, fw=4.00.23 [IP]
Display further disk information using fdisk
The output from fdisk -l gives further information about the disks displayed in the dmesg output above.Type the following command, fdisk -l
Disk /dev/sda: 36.3 GB, 36362518528 bytes 255 heads, 63 sectors/track, 4420 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 38 305203+ 83 Linux /dev/sda2 39 299 2096482+ 82 Linux swap /dev/sda3 300 4420 33101932+ 8e Linux LVM Disk /dev/sdb: 21.4 GB, 21474836480 bytes 64 heads, 32 sectors/track, 20480 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Disk /dev/sdb doesn't contain a valid partition table Disk /dev/sdc: 21.4 GB, 21474836480 bytes 64 heads, 32 sectors/track, 20480 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Disk /dev/sdc doesn't contain a valid partition table Disk /dev/sdd: 39.7 GB, 39728447488 bytes 64 heads, 32 sectors/track, 37888 cylinders Units = cylinders of 2048 * 512 = 1048576 bytes Disk /dev/sdd doesn't contain a valid partition table Disk /dev/sde: 107.3 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sde doesn't contain a valid partition table Disk /dev/sdf: 227.8 GB, 227891216384 bytes 255 heads, 63 sectors/track, 27706 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/sdf doesn't contain a valid partition table
Check the contents of files in /proc/scsi/qla2xxx
List the contents of the files in proc/scsi/qla2xxx to determine if the qlogic driver is installed and loaded.We can see from the output below that this server is using fibre channel host adapters.
Type the following, cat /proc/scsi/qla2xxx/1
QLogic PCI to Fibre Channel Host Adapter for QMC2462S:
Firmware version 4.00.23 [IP] , Driver version 8.01.06-fo
ISP: ISP2422
Request Queue = 0x37b80000, Response Queue = 0x37b60000
Request Queue count = 4096, Response Queue count = 512
Total number of active commands = 0
Total number of interrupts = 122558379
Device queue depth = 0x20
Number of free request entries = 2618
Number of mailbox timeouts = 0
Number of ISP aborts = 0
Number of loop resyncs = 0
Number of retries for empty slots = 0
Number of reqs in pending_q= 0, retry_q= 0, done_q= 0, scsi_retry_q= 0
Number of reqs in failover_q= 0
Host adapter:loop state = , flags = 0x1e43
Dpc flags = 0x4000000
MBX flags = 0x0
Link down Timeout = 030
Port down retry = 012
Login retry count = 012
Commands retried with dropped frame(s) = 0
Product ID = 0000 0000 0000 0000
SCSI Device Information:
scsi-qla0-adapter-node=200000e08b54bb23;
scsi-qla0-adapter-port=210000e08b54bb23;
scsi-qla0-target-0=202400a0b678eb36;
FC Port Information:
scsi-qla0-port-0=200400a0b811eb36:202400a0b678eb36:670000:81;
scsi-qla0-port-1=200000e08b8e0979:210000e08b8e0345:670300:82;
scsi-qla0-port-2=200400a0b811eb36:202500a0b678eb36:680000:83;
scsi-qla0-port-3=200100e08bae0979:210100e08bae345:680300:84;
scsi-qla0-port-4=200100e08ba9bb23:210100e08ba8dd23:680200:85;
SCSI LUN Information:
(Id:Lun) * - indicates lun is not registered with the OS.
( 0: 0): Total reqs 31229134, Pending reqs 0, flags 0x2, 1:3:83 00
( 0: 1): Total reqs 11643657, Pending reqs 0, flags 0x2, 0:0:81 00
( 0: 2): Total reqs 25397262, Pending reqs 0, flags 0x2, 0:0:81 00
( 0: 3): Total reqs 51159056, Pending reqs 0, flags 0x2, 0:0:81 00
( 0: 4): Total reqs 34337567, Pending reqs 0, flags 0x2, 0:0:81 00
Check the modprobe.conf file for the relevant lines to load the qlogic modules
Type the following, grep qla /etc/modprobe.confalias scsi_hostadapter2 qla2xxx_conf alias scsi_hostadapter3 qla2xxx alias scsi_hostadapter4 qla2400 options qla2xxx ConfigRequired=1 ql2xsuspendcount=70 ql2xretrycount=60
Check the qlogic modules are loaded
Type the following, lsmod | grep qlaqla2400 207104 0 qla2xxx 307448 14 qla2400 qla2xxx_conf 305924 1 scsi_mod 116557 3 qla2xxx,mptscsih,sd_mod
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