Compaq Presario SR1839UK Desktop PC (home support page)
Product Information there, then
Motherboard Specifications, P5LP-LE (Lithium)
•4 SATA connectors
•Each connector supports 1 serial ATA-150 disk drive
•One floppy port supports 1 FDD with 360K, 720K, 1.2M, 1.44M and 2.88Mbytes
So - you could have either of, or both, IDE and/or SATA hard drives.
"•Each connector supports 1 serial ATA-150 disk drive "
Is the hard drive that is not being detected SATA ?
If the drive that is not being detected supports SATA II specs rather than just the original SATA specs, some main chipsets that support only the original SATA specs (max 150 mbytes/sec burst data transfer speed) WILL NOT detect a SATA II (max 300 mbytes/sec burst data transfer speed) drive, as a SATA drive, unless the hard drive has pins you can install a tiny jumper on, and you install the jumper on those pins to limit the drive to the original SATA specs (max 150 mbytes/sec burst data transfer speed).
Some desktop hard drive models have the pins for that - some don't.
If your model doesn't have those pins, the only way you're going to be able to get this mboard to recognize your SATA II drive is if you buy and connect the drive to a
- SATA drive controller PCI card. Best choice - all new and recent SATA drive controller chipsets support SATA II specs.
- or - a SATA to IDE adapter, and connect it to an IDE header on the mboard, but that's limited to the max burst data transfer speed of IDE - 133 mbytes/sec
- or - a USB to SATA II drive adapter, but that's limited to the max burst data transfer speed of the USB connection (usually that's a lot less than 133 mbytes/sec), or 150 mbytes/sec (the original SATA specs).
If you're not sure whether the SATA drive supports SATA II specs.....
- new original SATA spec drives haven't been commonly available for at least two years - the drive would have to be OLDER than that.
- if that doesn't help, quote the model number of it. You will need to open up the case, look for the model number on the inner end of the drive near where the power and data cables plug into it, or if it's not shown there, you will need to remove the drive and find the model on it's label.
Product Information there, then
Compaq Presario SR1839UK Desktop PC Product Specifications
Product number EV993AA
Introduction date 27-Apr-2006
Country/region sold in:
•300 GB SATA
So - the SR1839UK system originally had a SATA hard drive, no IDE hard drive.
It would have been an original SATA spec drive (max 150 mbytes/sec burst data transfer speed), for sure.
""I dont know how to check if the hard drive is in the bios, when i looked that was all that i could see to identify 2 drives - if there's a way to check you can explain i am happy to do so."
We can't help you regarding what you see in the bios Setup other than what is in this:
BIOS Setup Utility Information and Menu Options
...., unless someone who sees this Topic happens to have the same Compaq bios version. That's typical for brand name system bios versions.
NOTE that it shows
Drive 1: (model of the hard drive)
Drive 2: (model of the optical drive)
If the bios does NOT list the model of the hard drive that is not being detected, then it's probably a SATA II drive, and you need to install a jumper on it to limit it to 150 mbytes/sec max burst data transfer speeds.
If the bios DOES list the model of the hard drive that is not being detected in Windows....
- is the hard drive that is not being detected in Windows a new hard drive or a used drive that has it had it's partition(s) deleted ?
The hard drive must be software partitioned and formatted using something Windows can recognize (NTFS, FAT32, or FAT software partitioning, formatting) in order for it to show up in My Computer and Windows Explorer . A new hard drive doesn't have that.
You can software partition and format it in Disk Management in Windows, by making at least one partition on the drive.
- is the hard drive that is not being detected in Windows one that already has data on it that you could read fine previously and that data hasn't been touched ?
See response 1 regarding checking your data ccable connections.
"the xp cd had sp 2 on it."
It already supports SATA drive controllers (when the drivers are installed for them, if the bios has the SATA controllers in SATA mode) / SATA drives, support for USB 2.0 controllers / devices is built into it, and it recognizes drives or drive partitions larger than 137gb manufacturer's size / 128gb binary size in Windows.