| | この項目はハードディスクからデータを読み込む時に発生したエラーの発生率。値が閾値より低い場合、ハードディスクの読み込み動作に障害がある。
This attribute value depends of read errors, disk surface condition and
indicates the rate of hardware read errors that occurred when reading data
from a disk surface. Lower values indicate that there is a problem with
either disk surface or read/write heads. |
| 02 |
Throughput Performance |
ハードディスクの処理能力(スループット)を表す。この値が閾値以下の場合、高い確率でハードディスクに障害がある。
Overall (general) throughput performance of a hard disk drive. If the value
of this attribute is deceasing there is a high probability of troubles
with your disk.
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| 03 |
Spin Up Time |
ハードディスクに電源を供給し回転を開始してから規定の回転数に達するまでに要した平均時間。
Average time of spindle spin up (from zero RPM (Revolutions Per Minute)
to fully operational). Active SMART shows the raw value of this attribute
in milliseconds or seconds.
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| 04 |
Start/Stop Count |
ハードディスクのスピンドルモーターが回転/停止した回数。
This raw value of this attribute is a count of hard disk spindle start/stop
cycles.
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| 05 |
Reallocated Sectors Count |
代替処置（不良セクタの代替え用に予約された予備セクタへの割付処理）が行われた不良セクタの数。
Count of reallocated sectors. When the hard drive finds a read/write/verification
error, it marks this sector as "reallocated" and transfers data
to a special reserved area (spare area).
This process is also known as remapping and "reallocated" sectors
are called remaps. This is why, on a modern hard disks, you can not see
"bad blocks" while testing the surface - all bad blocks are hidden
in reallocated sectors. However, the more sectors that are reallocated,
the more a sudden decrease (up to 10% and more) can be noticed in the disk
read/write speed.
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| 07 |
Seek Error Rate |
磁気ヘッドが目的のトラックへ移動しようとして失敗（シークエラー）した発生率。ヘッドのシーク機構の故障やハードディスクの熱などによって発生する。数値が低い場合、ハードディスクの表面やハードディスクのメカニズムに問題がある可能性が高い。
Rate of seek errors of the magnetic heads. If there is a failure in the
mechanical positioning system, a servo damage or a thermal widening of
the hard disk, seek errors arise. More seek errors indicates a worsening
condition of a disk surface and the disk mechanical subsystem.
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