Owner's manual

503/503-P1 Series Industrial Grade SSD Product Manual v2.0Cactus Technologies

5.1.14. Read Sector(s), Read Sector(s) Ext-20H, 21H, 24H

The Read Sector(s) command reads from 1 to 256 sectors as specied in the Sector Count register.

A sector count of 0 requests 256 sectors. The transfer begins at the sector specied in the Sector

Number Register. When this command is issued and after each sector of data (except the last one)

has been read by the host, the drive sets BSY, puts the sector of data in the buer, sets DRQ, clears

BSY, and generates an interrupt. The host then reads the 512 bytes of data from the buer.

5.1.15. Read Verify Sector(s), Read Verify Sector(s) Ext-40H, 42H

The Read Verify Sector(s) command is identical to the Read Sectors command, except that DRQ is

never set and no data is transferred to the host. When the command is accepted, the drive sets BSY.

When the requested sectors have been veried, the drive clears BSY and generates an interrupt.

Upon command completion, the Command Block Registers contain the cylinder, head, and sector

number of the last sector veried.

If an error occurs, the verify terminates at the sector where the error occurs. The Command Block

Registers contain the cylinder, head and sector number of the sector where the error occurred. The

Sector Count Register contains the number of sectors not yet veried.

5.1.16. Recalibrate-1XH

The Recalibrate command is eectively a NOP command to the drive and is provided for

compatibility purposes.

5.1.17. Request Sense-03H

The Request Sense command requests an extended error code after a command ends with an error.

Table 5-11 denes the valid extended error codes for Cactus Technologies Industrial SSD products.

The extended error code is returned to the host in the Error Register. This command must be the

next command issued to the drive following the command that returned an error.

Table 5-11. Extended Error Codes

Extended Error Code Description

01h Self Test OK (No Error)

03h Write Failed

09h Miscellaneous Error

11h Uncorrectable ECC Error

18h Corrected ECC Error

20h Invalid Command

21h Invalid Address

27h Write Protection Violation