Air filter | Fujitsu MPF3XXXAH manual

4.2.5Air filter

There are two types of air filters: a breather filter and a circulation filter.

The breather filter makes an air in and out of the DE to prevent unnecessary pressure around the spindle when the disk starts or stops rotating. When disk drives are transported under conditions where the air pressure changes a lot, filtered air is circulated in the DE.

The circulation filter cleans out dust and dirt from inside the DE. The disk drive cycles air continuously through the circulation filter through an enclosed loop air cycle system operated by a blower on the rotating disk.

C141-E106-01EN

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Fujitsu MPF3XXXAH manual Air filter

Contents

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DiorHdmardy Pidag Dstrobe IordyDdmardy Logical Interface 1 I/O registers I/O registers DA2 DA1 DA0 Command block registers Icrc UNC Idnf Abrt TK0NF AmnfPage DEV HS3 HS2 HS1 HS0 BSY Drdy DSC DRQ ERR Page Srst Host CommandsControl block registers Command code and parameters Command code and parameters 1 Command code and parameters 2 LBA LSB Command descriptionsLBA 1F2 HSC Transfer sector count 1F1 HFR = 0 or C141-E106-01EN Read Multiple XC4 Execution example of Read Multiple command BSY Drdy Intrq DRQ 1F3 HSN Start sector No 1F4 HCL End cylinder No. LSB LBA Write Multiple XC5 LBA Write Verify X3C LBA 1F2 HSC 1F1 HER Error information C141-E106-01EN Initialize Device Parameters Identify Device XEC 7DEOH ,QIRUPDWLRQWREHUHDGE\,17,9,&FRPPDQGRI 7DEOH ,QIRUPDWLRQWREHUHDGE\,17,9,&FRPPDQGRI 0DQXIDFWXUHUVUHFRPPHQGHG0$WUDQVIHUF\FOHWLPHQV@ LW5HVHUYHG LW5HOHDVH,QWHUUXSWVXSSRUWHG LW 8QGHILQHG SET Features XEF Identify Device DMA XEE 1RRSHUDWLRQ UlyhrshudwlrqprghQdeohvwkhzulwhfdfkhixqfwlrq 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$GGUHVVWUDQVODWLRQHDPSOHLQ/%$PRGH $PRGHLjxuhvkrzvdqhdpsohridvvxplqjwkhuhlvqrwudfnvnhz 3RZHU6DYH Gohprgh $FWLYHPRGH$GHYLFHHQWHUVWKHDFWLYHPRGHXQGHUWKHIROORZLQJFRQGLWLRQV 5HVHWKDUGZDUHRUVRIWZDUH Power commands QGH 6SDUHDUHD6SDUHF\OLQGHUIRUDOWHUQDWLYHDVVLJQPHQW Ljxuh 6HFWRUVOLSSURFHVVLQJ Khqdzulwhhuururffxuvdqgwkhhuurugrhvqrwuhfryhuhg $OWHUQDWHF\OLQGHUDVVLJQPHQW$OWHUQDWH \OLQGHU$OUHDG\ Ljxuh Dwdexiihufrqiljxudwlrq 5HDG$KHDG&DFKHDwdexiihufrqiljxudwlrq ∙ Write Sectors ∙ Write DMA ∙ Write Multiple Caching operation∙ Read Sector S ∙ Read Multiple ∙ Read DMA DAP Usage of read segmentHAP Mis-hit data Empty data Read-ahead data New read-ahead data Hit data HAP set to hit position for data transfer Partially hit data Lack data Write Cache ∙ Write Sectors ∙ Write Multiple ∙ Write DMA XVLQHVV3ODQQLQJ