UPGRADING REPAIRING PCs
UPGRADING REPAIRING PCs UPGRADING REPAIRING PCs
102 Chapter 4—SCSI and IDE Hard Drives and Optical Drives Partition Status Type Volume W95US1U 1626 FAT16 100% X Total disk space is 1626 Mbytes (1 Mbyte = 1048576 bytes) Y Press Esc to continue X=Size of hard disk partition (drive has already been FDISKed) Y=Total disk space (as seen by FDISK) Use Table 4.5 to determine what the FDISK total disk space figure is telling you about your system. Table 4.5 FDISK Disk Space Detected as a Guide to Disk Problems X Value1 Y Value2 Drive Size Underlying Cause >504MB =504MB >504MB Binary Drive was prepared with LBA /FDISK (528MB mode enabled, but LBA Decimal) mode has been disabled in BIOS. See “Dangers of Altering Translation Settings” earlier in this chapter. Not listed =504MB >504MB LBA mode not enabled in BIOS or not present. Not listed 8192MB >8192MB BIOS supports LBA mode, (8.38 billion but not Extended Int13h bytes) modes. 1. The X value appears only when a drive has already been FDISKed. 2. The Y value appears on any drive being viewed through FDISK, whether the FDISK process has been completed or not. For more information about using FDISK, see the section “Using FDISK” later in this chapter. Getting LBA and Extended Int13h Support for Your System If your computer is incapable of detecting the full capacity of your hard disk or locks up after you install the hard drive, your BIOS is not compatible with your hard drive. Use Table 4.6 to determine the causes and solutions that will help you get full capacity from your new hard disk with maximum safety.
Using LBA Mode 103 Table 4.6 Why IDE Drive Is Not Detected at Full Capacity Drive Operating Symptom Size System Cause Solution System locks >2.1GB Any BIOS cannot Upgrade BIOS (see up after handle 4,096 Table 4.7). installing cylinders or new drive. more even with LBA enabled. >32GB Any BIOS cannot Upgrade BIOS (see handle capacity even with LBA enabled. Table 4.7). Full capacity >504MB– MS-DOS, No LBA mode Upgrade BIOS (see not 8.4GB Windows or inadequate Table 4.7). available. 9x/NT/2000, LBA support OS/2 in BIOS. >8.4GB Windows NT Atapi.sys not Update Atapi.sys correct version; (included in SP3 or BIOS lacks above of NT 4.0) and Extended upgrade BIOS if Int13h necessary (see support, required for large drives. Table 4.7). >8.4GB Novell Drivers are Contact Novell for NetWare 4.11 needed to drivers; NetWare 5 support drive will support >8.4GB at full drives; upgrade BIOS capacity. if necessary. >8.4GB IBM OS/2 Patch needed Contact IBM for Warp to support patch file; upgrade drive at full capacity. BIOS if necessary. >8.4GB Windows 9x Windows 9x Upgrade BIOS (see Windows 2000 has Enhanced Table 4.7). Windows Me Int13h support for drive, but BIOS lacks support. >8.4GB MS-DOS MS-DOS can’t Buy 8.4GB or below; use IDE drives update to Windows above 8.4GB. 9x; use SCSI drives; use big. Determining Whether Your System Supports Extended Int13h Drives that are 8.4GB or larger require Extended Int13h support in the BIOS to be accessible at full capacity. This size represents a second barrier to drive capacity for MS-DOS, and one that cannot be
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Using LBA Mode 103<br />
Table 4.6 Why IDE Drive Is Not Detected at Full Capacity<br />
Drive Operating<br />
Symptom Size System Cause Solution<br />
System locks >2.1GB Any BIOS cannot Upgrade BIOS (see<br />
up after handle 4,096 Table 4.7).<br />
installing cylinders or<br />
new drive. more even<br />
with LBA<br />
enabled.<br />
>32GB Any BIOS cannot Upgrade BIOS (see<br />
handle capacity<br />
even with LBA<br />
enabled.<br />
Table 4.7).<br />
Full capacity >504MB– MS-DOS, No LBA mode Upgrade BIOS (see<br />
not 8.4GB Windows or inadequate Table 4.7).<br />
available. 9x/NT/2000, LBA support<br />
OS/2 in BIOS.<br />
>8.4GB Windows NT Atapi.sys not Update Atapi.sys<br />
correct version; (included in SP3 or<br />
BIOS lacks above of NT 4.0) and<br />
Extended upgrade BIOS if<br />
Int13h necessary (see<br />
support,<br />
required for<br />
large drives.<br />
Table 4.7).<br />
>8.4GB Novell Drivers are Contact Novell for<br />
NetWare 4.11 needed to drivers; NetWare 5<br />
support drive will support >8.4GB<br />
at full drives; upgrade BIOS<br />
capacity. if necessary.<br />
>8.4GB IBM OS/2 Patch needed Contact IBM for<br />
Warp to support patch file; upgrade<br />
drive at full<br />
capacity.<br />
BIOS if necessary.<br />
>8.4GB Windows 9x Windows 9x Upgrade BIOS (see<br />
Windows 2000 has Enhanced Table 4.7).<br />
Windows Me Int13h support<br />
for drive, but<br />
BIOS lacks<br />
support.<br />
>8.4GB MS-DOS MS-DOS can’t Buy 8.4GB or below;<br />
use IDE drives update to Windows<br />
above 8.4GB. 9x; use SCSI drives;<br />
use big.<br />
Determining Whether Your System Supports Extended<br />
Int13h<br />
Drives that are 8.4GB or larger require Extended Int13h support in<br />
the BIOS to be accessible at full capacity. This size represents a second<br />
barrier to drive capacity for MS-DOS, and one that cannot be
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