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U4

Capacity:
Speed:
Average Seek Time:
 Cylinders:
Heads:
Sectors:

8.45 GB
5400 rpm
10.5 ms
1023
256
63


Installation Guide | Product Manual

 

Odd characters? Click here for help. A version of this specification with the linedraw characters approximated by text is available by clicking here.

                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1999



ST-38421A (U4 8421, Ultra ATA/66)

  浜様様様様様
   REAR VIEW 
  藩様様様様様
                  J2  40 pin I/O Cable Connection
                     pin-20 removed
                  
                              敖 [spare jumper on pins 5-7]
                              
       嬪様様様様 獲様様様様冤由様様1/陳陳陳陳\    TOP (HDA)
      裕::::::::::::::::::1 :: : :  0 0 0 0 獲
       塒様様様様様様様様様溶8獲獲獲獲青5GG12    BOTTOM
                                 
                                青祖 Reserved
            O=OFF, X=ON -->>  X-O陳陳陳 Master ON
                              O-O陳陳陳 Slave  OFF

                              X-X陳陳陳 Slave Present (when pins 7-8 ON
                                         used on Master drive)
                              O-X陳陳陳 Cable Select  (when pins 7-8 OFF)



                             ST-38421A

       FORMATTED CAPACITY (MB) __________________8447
       ACTUATOR TYPE ____________________________VOICE COIL
       CYLINDERS __PHYSICAL______________________
       HEADS ______PHYSICAL______________________4
       DISCS (3.5 in) ___________________________2
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________MR
       RECORDING METHOD _________________________EPRML 16/17 ZBR
       INTERNAL TRANSFER RATE (Mbits/sec) _______up to 206
       EXTERNAL TRANSFER RATE (Mbytes/sec) ______up to 66.6
       PIO/DMA/UDMA MODE (max) __________________4/2/4
       DMA SUPPORT ______________________________EISA Type B
       SPINDLE SPEED (RPM) ______________________5400
       AVERAGE LATENCY (mSEC) ___________________5.6
       BUFFER ___________________________________256K
        Read/Write Multiple, Read Look-Ahead,
        Multi-Segmented
       INTERFACE ________________________________Ultra ATA/66
       SECTORS PER DRIVE (LBA mode) _____________16,498,944
       TPI (TRACKS PER INCH) ____________________13.1k
       BPI (KBITS PER INCH) _____________________up to 241
       AVERAGE ACCESS (ms seek/read/write) ______/10.5/11.5
       SINGLE TRACK SEEK (ms seek/read/write) ___/2.0/2.75
       MAX FULL SEEK (ms seek/read/write) _______/24.0/26.0
       MTBF (power-on hours) Office _____________400,000
       SHOCK (G's, 11ms/2ms):
                operating _______________________/63
                abnormal ________________________
                nonoperating ____________________75/300
       ACOUSTICS (bels) (typ/max) _______________3.3/4.3
       POWER DISSIPATION (watts) ________________
       POWER REQUIREMENTS: +12V START-UP (amps) _1.5
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________7.0
                           IDLE _________________3.1
                           STANDBY ______________0.8
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________*

       Physical:
                    Height (inches/mm):    1.03/26.1
                    Width  (inches/mm):    4.02/101.8
                    Depth  (inches/mm):    5.78/147.0
                    Weight      (lb/g):     1.2/580

 * MAY REQUIRE FORMATTING AND PARTITIONING SOFTWARE.  ALSO, CHECK TO
SEE IF YOUR CMOS SETUP HAS A "CUSTOM" OR "USER DEFINABLE" DRIVE TYPE
AVAILABLE. (see below)

Possible translations:
                       This translation is generally acceptable, as
                       is, for non-DOS operating systems:
     16,368 cyl, 16 heads, 63 sectors = 8,447,459,328

                       DOS operating systems may require a translation
                       that uses larger values for the CMOS head
                       parameter which lowers cylinders below 1024:
       1023 cyl, 256 heads, 63 sectors = 8,447,459,328

                       Other FULL-CAPACITY solutions for DOS operating
                       systems include third-party drive preparation
                       software, system BIOS which supports LBA mode
                       or bios driven host adapters. Otherwise,
                       capacity may be limited to:
       1024 cyl, 16 heads, 63 sectors = 528,482,304


Some systems BIOS have capacity limitations. 
Types that have been identified are:
     a 2.113GB or 4095 cylinder limitation 
     a 3.262GB or 6322 cylinder limitation 
     a 4.22GB  or 8192 cylinder limitation

DOS 16-bit FAT file system cannot access more than 2.147 Gbytes per 
partition.  FAT32 file system can create single partitions and
logical drives up to 2TB.

Note: A "custom" or "user-defined" CMOS drivetype  may ask for a
numerical value for the Write Precompensation cylinder and for the
Landing Zone cylinder.  A basic rule-of-thumb for drive models that do
not require the old Write Precomp technique or a Landing Zone because
they are Auto-Parking is to add 1 to the cylinder value being used. As
an example: If cylinders equaled 820, then both Write Precomp and
Landing Zone would be entered as 821. Some BIOS will convert this to
65535 or -1, which are functionally equivalent to "none (not used)".

Already low-level formatted at the factory.

Since a User-definable or Custom translation geometry may be used, it
is imperative that the values be written down and kept with your
permanent records for retrieval in the event of CMOS battery failure.

Seagate reserves the right to change, without notice, product
offerings or specifications. (01/17/2000)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/at/ST38421A.TXT.


 



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