Does the Intel® SSD have a write cache?
Yes, however data caching is limited to the controller for enhanced performance.

Is the write cache enabled by default?
Yes, the cache is enabled by default

Can we disable the cache of SSD?
In order to disable the cache, go to Device Manager-> right-click on the SSD and then Properties -> click on Policies tab ->untick Enable write caching on the disk.

Can SSD cache save the data if the system is power off?
This cache depends on having a powered on system, therefore the data will be lost in case of power loss.

What is the capability of SSD cache?
The cache size is 256K

Disclaimer

Operating System:

Windows XP Professional x64 Edition*, Windows XP(Longhorn Beta 1)*, Windows Vista(Beta 1)*, Windows Vista 64*, Windows Vista Starter, 32-bit version*, Windows Vista Home Basic, 32-bit version*, Windows Vista Home Premium, 32-bit version*, Windows Vista Business, 32-bit version*, Windows Vista Enterprise, 32-bit version*, Windows Vista Ultimate, 32-bit version*, Windows Vista(RC2)*, Windows Vista Home Basic, 64-bit version*, Windows Vista Home Premium, 64-bit version*, Windows Vista Business, 64-bit version*, Windows Vista Enterprise, 64-bit version*, Windows Vista Ultimate, 64-bit version*, Windows Vista *, Windows Vista 32*, Windows XP Starter Edition*, Windows Server 2008 *, Windows Server 2008 Standard *, Windows Server 2008 Standard x64*, Windows Server 2008 Enterprise *, Windows Server 2008 Enterprise x64*, Windows Server 2008 Datacenter *, Windows Server 2008 Datacenter x64*, Windows Web Server 2008 *, Windows Web Server 2008 x64*, Windows Server 2008 for Itanium-based Systems*, Windows Home Server*, Windows Server 2008 R2 Standard*, Windows Server 2008 R2 Enterprise*, Windows Server 2008 R2 for Datacenter*, Windows Web Server 2008 R2*, Windows Server 2008 R2 Foundation*, Windows Server 2008 R2 for Itanium-based Systems*, Windows 7 *, Windows 7 (32-bit)*, Windows 7 (64-bit)*, Windows 7 Enterprise, 32-bit version*, Windows 7 Enterprise, 64-bit version*, Windows 7 Home Basic, 32-bit version*, Windows 7 Home Basic, 64-bit version*, Windows 7 Home Premium, 32-bit version*, Windows 7 Home Premium, 64-bit version*, Windows 7 Professional, 32-bit version*, Windows 7 Professional, 64-bit version*, Windows 7 Starter Edition*, Windows 7 Ultimate, 32-bit version*, Windows 7 Ultimate, 64-bit version*, Windows 7(RC1, 32-bit)*, Windows 7(RC1, 64-bit)*, Windows HPC Server 2008*, Windows XP *, Windows XP 64-Bit Edition*, Windows XP Professional*, Windows XP Home Edition*, Windows XP Tablet PC Edition*, Windows XP Media Center Edition*, Windows XP 64-Bit Edition Version 2003*

This applies to:

Intel® SSD 320 Series (120GB, 2.5in SATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (160GB, 1.8in microSATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (160GB, 2.5in SATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (300GB, 1.8in microSATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (300GB, 2.5in SATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (40GB, 2.5in SATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (600GB, 2.5in SATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (80GB, 1.8in microSATA 3Gb/s, 25nm, MLC) Intel® SSD 320 Series (80GB, 2.5in SATA 3Gb/s, 25nm, MLC) Intel® SSD 510 Series (120GB, 2.5in SATA 6Gb/s, 34nm, MLC) Intel® SSD 510 Series (250GB, 2.5in SATA 6Gb/s, 34nm, MLC) Intel® SSD X18-M Series (160GB, 1.8in microSATA 3Gb/s, 34nm, MLC) Intel® SSD X18-M Series (80GB, 1.8in microSATA 3Gb/s, 34nm, MLC) Intel® SSD X25-E Series (32GB, 2.5in SATA 3Gb/s, 50nm, SLC) Intel® SSD X25-E Series (64GB, 2.5in SATA 3Gb/s, 50nm, SLC) Intel® SSD X25-M Series (120GB, 2.5in SATA 3Gb/s, 34nm, MLC) Intel® SSD X25-M Series (160GB, 2.5in SATA 3Gb/s, 34nm, MLC) Intel® SSD X25-M Series (80GB, 2.5in SATA 3Gb/s, 34nm, MLC) Intel® SSD X25-V Series (40GB, 2.5in SATA 3Gb/s, 34nm, MLC)