man Pages(7):Device and Network Interfaces

ssd(7D)

NAME

ssd- driver for SPARCstorage Array and Fibre Channel Arbitrated Loop disk devices

SYNOPSIS

ssd@port,target:partition

DESCRIPTION

This driver handles both SCSI-2 disks in the SPARCstorage Array and Fibre Channel Arbitrated Loop (FC-AL) disks on Private loops.

The specific type of each disk is determined by the SCSI inquiry command and reading the volume label stored on block 0 of the drive. The volume label describes the disk geometry and partitioning; it must be present or the disk cannot be mounted by the system.

The block-files access the disk using the system's normal buffering mechanism and are read and written without regard to physical disk records. There is also a "raw" interface that provides for direct transmission between the disk and the user's read or write buffer. A single read or write call usually results in one I/O operation; raw I/O is therefore considerably more efficient when many bytes are transmitted. The names of the block files are found in /dev/dsk; the names of the raw files are found in /dev/rdsk.

I/O requests (such as lseek(2)) to the SCSI disk must have an offset that is a multiple of 512 bytes (DEV_BSIZE), or the driver returns an EINVAL error. If the transfer length is not a multiple of 512 bytes, the transfer count is rounded up by the driver.

Partition 0 is normally used for the root file system on a disk, partition 1 as a paging area (for example, swap), and partition 2 for backing up the entire disk. Partition 2 normally maps the entire disk and may also be used as the mount point for secondary disks in the system. The rest of the disk is normally partition 6. For the primary disk, the user file system is located here.

Each device also has error statistics associated with it. These must include counters for hard errors, soft errors and transport errors. Other data may be implemented as required.

IOCTLS

Refer to dkio(7I).

ERRORS

EACCES: Permission denied.
EBUSY: The partition was opened exclusively by another thread.
EFAULT: The argument was a bad address.
EINVAL: Invalid argument.
EIO: An I/O error occurred.
ENOTTY: The device does not support the requested ioctl function.
ENXIO: When returned during open(2), this error indicates the device does not exist.
EROFS: The device is a read-only device.

FILES

ssd.conf: driver configuration file
/dev/dsk/cntndnsn: block files
/dev/rdsk/cntndnsn: raw files

where, for the SPARCstorage Array:

cn: is the controller number on the system. Each SPARCstorage Array will have a unique controller number
tn: port number within the SPARCstorage Array n
dn: SCSI target n
sn: partition n

and for all FC-AL disks:

cn: is the controller number on the system.
tn: 7-bit disk loop identifier, such as switch setting
dn: SCSI lun n
sn: partition n (0-7)

DIAGNOSTICS

Error for command '<command name>'      Error Level: Fatal
Requested Block <n>, Error  Block: <m>
Sense Key: <sense key name>
Vendor '<vendor name>': ASC = 0x<a> (<ASC name>), ASCQ = 0x<b>, FRU = 0x<c>

Check Condition on REQUEST SENSE: A REQUEST SENSE command completed with a check condition. The original command will be retried a number of times.
Label says <m> blocks Drive says <n> blocks: There is a discrepancy between the label and what the drive returned on the READ CAPACITY command.
Not enough sense information: The request sense data was less than expected.
Request Sense couldn't get sense data: The REQUEST SENSE command did not transfer any data.
Reservation Conflict: The drive was reserved by another initiator.
SCSI transport failed: reason 'xxxx' : {retrying|giving up}: The host adapter has failed to transport a command to the target for the reason stated. The driver will either retry the command or, ultimately, give up.
Unhandled Sense Key <n>: The REQUEST SENSE data included an invalid sense key.
Unit not Ready. Additional sense code 0x<n>: The drive is not ready.
corrupt label - bad geometry: The disk label is corrupted.
corrupt label - label checksum failed: The disk label is corrupted.
corrupt label - wrong magic number: The disk label is corrupted.
device busy too long: The drive returned busy during a number of retries.
disk not responding to selection: The drive was probably powered down or died.
i/o to invalid geometry: The geometry of the drive could not be established.
incomplete read/write - retrying/giving up: There was a residue after the command completed normally.
logical unit not ready: The drive is not ready.
no bp for disk label: A bp with consistent memory could not be allocated.
no mem for property: Free memory pool exhausted.
no memory for disk label: Free memory pool exhausted.
no resources for dumping: A packet could not be allocated during dumping.
offline: Drive went offline; probably powered down.
requeue of command fails <n>: Driver attempted to retry a command and experienced a transport error.
ssdrestart transport failed (<n>): Driver attempted to retry a command and experienced a transport error.
transfer length not modulo <n>: Illegal request size.
transport rejected (<n>): Host adapter driver was unable to accept a command.
unable to read label: Failure to read disk label.
unit does not respond to selection: Drive went offline; probably powered down.

SunOS 5.7 Last Revised 27 May 1997