I just need to know how big of a hard drive this model will handle with the stock BIOS that came with it. I have the adapter to the mainboard and I know it's an enhanced IDE ATA-5. It came with a 40 gig and I would like to get as big a drive as I can and still have the BIOS read it. Thank You!
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Re: I need to replace the hard drive in my Toshiba
The ATA-5 Specification barrier
According to the ATA specification, any drive over 7.88GB (8.46 billion Bytes) is supposed to report its "geometry" as 16383/16/63 (C/H/S). Which enables old software to access the first 7.84 to 7.88GB of such a drive, using CHS addressing and the BIOS Int 13h system call. And while a P-CHS over 16383/16/63 can be used to access all the drive capacity-- up to the ATA-5 128GB limit-- that is not the recommended way to do so. Rather, LBA addressing should be used to access those larger capacity drives. (Or at least any partition that goes over the 7.88GB BIOS Int 13h CHS barrier.)
So, LBA uses a 28 bit binary number to specify the sector number on a drive. Thus:
228 = 268435455 Sectors
268435455 Sectors x 512 Bytes/Sector = 137438952960 Bytes
Resulting in the 128GB (137.4 billion Bytes) ATA-5 size limit.
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If you are the original owner Toshiba will reset the bios for a fee and it is not cheap, they may include the HDD reset, if not! www.ebay.com type password, or hard drive password. I would check bios password, probably a lot cheaper if you can find the right seller, also check www.download.com some software may be free.
According to the detailed specs on that model, it came with a 60GB
ATA-5 EIDI hard drive. therefore, you can use any ATA compatible
(ATA-5, ATA-6 or ATA-100) EIDE/IDE drive that has jumpers enabling you
to configure the drive as "Master". Western Digital Blue Scorpio and
Seagate Momentus lines both have models that will fit the bill. You
can find those drives at your neighborhood BestBuy or Staples pretty
easily. I don't know if the A25 BIOS supports 48-bit
logical block addressing (LBA), in spite of what toshiba says, If it only supports 24-bit LBA the
maximum drive size is 137GB. If it supports 48-bit LBA then you can go
as high as you can find drives available; usually 500GB. I suspect that
it supports 48-bit LBA because various online vendors list up to 250GB
drives for that model. The most important thing about the drive,
though, is that it MUST be jumperable as 'master'. A cable select only
drive won't work. Both the Western Digital and Seagate EIDE models have
jumpers. hope this helps but if you need anything else just ask:)
The maximum size hard disk you can install in your Toshiba depends upon the BIOS. The BIOS can support a hard disk up to a certain capacity. Check the specification of your model Toshiba to see the maximum hard drive it can support.
An alternative -
You can use an external USB hard drive and connect it to your Toshiba and not be restricted by the BIOS. You can use USB hard drive 500 Mb to more than 1 Tb.
The other advantage of using an external USB hard drive is you do not need to install Windows, the device drivers and your programs on the new hard drive.
The hard drive password is set from the BIOS configuration where the hard drive was installed and you need to know the password to remove the existing password. You can only remove the password from that computer's BIOS and moving the hard drive to another omputer will not allow you to remove the password or access any data on that hard drive because the password is stored in the hard drive's firmware. This password protected hard drives prevents unauthorized access to the data on that hard disk.
Removing the BIOS battery will reset the BIOS but will not remove the password.
Some computers have been setup with Power On Passwords and/or hard drive passords and it is possible to hack/read the Power On Password that is stored on an EEPROM chip on the laptop, but it is not a simple process.
You will need to buy a new hard drive and now you also have a nice paper weight.
There has to be a BIOS setup to detect the size of the drive. Its could be escape key f1 or f2. One of these keys should trigger it when the Toshiba screen picks up. I didn't see anything in the book about it.