For disk errors, look for cxtxdx in the messages or the sd device equivalent..
Example, sd0 below, you can check against and compare the iostat -E and iostat -En command to find the correct disk.
Hi all,
i have run iostat -em, and get below result. Can i know what is this output meaning, and how to fix that problem.
iostat -em
---- errors ---
device s/w h/w trn tot
sd7 0 1 0 1
sd8 1 1 0 2
sd9 0 1 0 1
sd10 0 ... (2 Replies)
All,
I am attempting to help tune a Sun for better performance (mainly for SAS 9.1), and have found indicators pointing to poor I/O utilization. I have run iostat -cx, and found one device in particular where the %w is in the 90's during processing. I have a feeling that this is where the SAS... (3 Replies)
Hi All AIX expert
i'm using AIX 5.2
When i execute this command which is :
----------------------------------------------------------------------
>> iostat -a
System configuration: lcpu=4 disk=30
tty: tin tout avg-cpu: % user % sys % idle % iowait
... (2 Replies)
Friends.
I have to compare iostat -x output with a tool on solaris. Now there is column called wait in the output field which is showing zero. Now, in order to create some load on my system this is what i am doing
I am creating a file using dd command , the size of which is... (5 Replies)
A find for the "iostat" command on a redhat 5 update 4 comes back with no results.
Any separate rpm needs to be installed to get the binary for this ?
Thanks in advance. (1 Reply)
I all,
I would like to know what are the causes of :
-soft error
-harderror
-transport error
and how to avoid and repare them.
I got the iostat out put below:
atng-mm01% iostat -En | grep -i hard
c0t0d0 Soft Errors: 1 Hard Errors: 0 Transport Errors: 0
c0t0d1 ... (3 Replies)
Hi Unix experts,
I have a question regarding a disk failure seen in "iostat -Enm" output:
# iostat -Enm
c1t0d0 Soft Errors: 0 Hard Errors: 7 Transport Errors: 9
Vendor: FUJITSU Product: MAU3073NCSUN72G Revision: 0802 Serial No: 0514F005M0
Size: 73.40GB <73400057856 bytes>
Media... (5 Replies)
Hello everyone,
Can you please explain me what kind of information do IOSTAT show ?
iostat -xnz 3 show me those informations:
The I/O of the c0t0d0 disk is normal ?
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 ... (3 Replies)
Hello, I support Oracle 11g on AIX 7.1.
Using the command
$iostat -D hdisk2 hdisk4 hdisk5 5
I get the following output:
hdisk5 xfer: %tm_act bps tps bread bwrtn
44.0 1.4M 178.2 1.4M 14.7K
read: ... (3 Replies)
Discussion started by: oracledba1024
3 Replies
LEARN ABOUT DEBIAN
tapset::scsi
TAPSET::SCSI(3stap)TAPSET::SCSI(3stap)NAME
tapset::scsi - systemtap scsi probe points
DESCRIPTION
This family of probe points is used to probe the SCSI activities. It contains the following probe points:
scsi.ioentry
Fires when SCSI mid layer prepares a SCSI request
Arguments:
disk_major
The major number of the disk
disk_minor
The minor number of the disk
device_state
The current state of the device. The possible values could be:
SDEV_CREATED = 1, /* device created but not added to sysfs
* Only internal commands allowed (for inq) */
SDEV_RUNNING = 2, /* device properly configured
* All commands allowed */
SDEV_CANCEL = 3, /* beginning to delete device
* Only error handler commands allowed */
SDEV_DEL = 4, /* device deleted
* no commands allowed */
SDEV_QUIESCE = 5, /* Device quiescent. No block commands
* will be accepted, only specials (which
* originate in the mid-layer) */
SDEV_OFFLINE = 6, /* Device offlined (by error handling or
* user request */
SDEV_BLOCK = 7, /* Device blocked by scsi lld. No scsi
* commands from user or midlayer should be issued
* to the scsi lld. */
scsi.iodispatching
Fires when the SCSI mid layer dispatches a SCSI command to the low level driver
Arguments:
host_no
The host number
channel
The channel number
lun
The lun number
dev_id
The scsi device id
device_state
The current state of the device.
data_direction
The data_direction specifies whether this command is from/to the device.
The possible values could be:
DMA_BIDIRECTIONAL = 0,
DMA_TO_DEVICE = 1,
DMA_FROM_DEVICE = 2,
DMA_NONE = 3,
request_buffer
The request buffer address
req_bufflen
The request buffer length
scsi.iodone
Fires when a SCSI command is done by low level driver and enqueued into the done queue.
Arguments:
host_no
The host number
channel
The channel number
lun
The lun number
dev_id
The scsi device id
device_state
The current state of the device
data_direction
The data_direction specifies whether this command is from/to the device.
scsi.iocompleted
Fires when SCSI mid layer runs the completion processing for block device I/O requests
Arguments:
host_no
The host number
channel
The channel number
lun
The lun number
dev_id
The scsi device id
device_state
The current state of the device
data_direction
The data_direction specifies whether this command is from/to the device.
goodbytes
The bytes completed.
SEE ALSO stap(1), stapprobes(3stap)IBM TAPSET::SCSI(3stap)