ZyXEL NAS540 User Guide - Page 63
SMART Info
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Chapter 4 Web Configurator Basics Table 18 S.M.A.R.T Overview (continued) LABEL DESCRIPTION Spin_Retry_C ount This field shows the total number of spin start retry attempts. This is the number of attempts to spin up to fully operational speed the hard drive has made when the first attempt did not succeed. An increase in this value is an indicator of hard disk mechanical subsystem problems. Reallocated_ Sector_Ct Command_ Timeout This field shows the total number of reallocated sectors on the hard drive. When the hard drive detects a read/write/verification error, it marks the sector as "reallocated" and transfers the data to a specially reserved (spare) area. The process is also known as remapping with "reallocated" sectors known as remaps. The more sectors the hard disk has to reallocate, the slower read and write speeds become. This field shows the temperature of the hard disk in degrees celsius (oC) and fahrenheit (oF). Model Family This field shows the model family of the hard disk. Device Model This field shows the hard disk model number that uniquely identifies a hard disk. Serial Number This field shows this individual hard disk's serial number from the manufacturer. LU WWN Device Id This field shows the hard disk's Logical Unit World Wide Name Device Identifier. Firmware Version This field shows the version number of the hard disk's internal operating software. User Capacity This field shows the hard disk's usable size. Sector Sizes This field shows the sector size of the hard disk. A sector is the smallest physical storage unit on a hard disk. Normally it is 512 bytes. Rotation Rate This field shows the rotational speed of the hard disk, measured in revolutions per minute (rpm). ATA Version This field shows the hard disk's Advanced Technology Attachment version number. SATA Version This field shows the hard disk's Serial ATA (SATA) version number. Local Time This field shows the local time that the hard disk is using. SMART support This field shows whether or not the hard disk is SMART-capable. SMART support This field shows whether or not the hard disk has SMART monitoring turned on. Close Click this button to close the screen. 4.4.6 SMART Info Use this screen to display more details information about the volume. NAS540 User's Guide 63