Hitachi HDT725025VLA380 Specifications - Page 135
Queue Index + 34.See Note 1 and Note 2.
UPC - 829686001084
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6 Byte Max Op Limit Maximum recommended continuous operating temperature. This is a one byte 2's complement number that allows a range from -127°C to +127°C to be specified. 80h is an invalid value. This is a fixed value. 7 Byte Over Limit Maximum temperature limit. This is a one byte 2's complement number that allows a range from -127°C to +127°C to be specified. 80h is an invalid value. This is a fixed value. 8 Byte Over Limit Minimum recommended continuous operating limit. This is a one byte 2's complement number that allows a range from -127°C to +127°C to be specified. 80h is an invalid value. This is a fixed value. 9 Byte Under Limit Minimum temperature limit. This is a one byte 2's complement number that allows a range from -127°C to +127°C to be specified. 80h is an invalid value. This is a fixed value. 29:10 Byte[20] Reserved 31:30 Word Queue Size Number of entry locations in history queue. This value is 128. 33:32 Word Queue Index Last updated entry in queue. Queue Index is zero-based, so Queue Index 0000h is the first location in the buffer (at offset 34). The most recent temperature entered in the buffer is at Queue Index + 34.See Note 1 and Note 2. (Queue Size+33):34 Byte[Queue Size] Queue Buffer This is a circular buffer of absolute HDA Temperature values. These are one byte 2's complement numbers, which allow a range from -127°C to +127°C to be specified. A value of 80h indicates an initial value or a discontinuity in temperature recording. The Actual time between samples may vary because commands may not be interrupted. The sampling period is the minimum time between samples. See Not 1.If the host changes the logging interval using the volatile option, the interval between entries in the queue may change between power cycles with no indication to the host. 511:(Queue Size +34) Byte [512-Queue Reserved Size-34] Deskstar T7K500 Hard Disk Drive Specification 121