Seagate ST480FP0021, ST120FP0001, ST100FP0021, ST100FP0001 manual Read zero after Trim is supported

Bit	Word 69
5	Read zero after Trim is supported
6	Optional ATA 28-bit commands supported
8	Download Microcode DMA supported
9	Set Max Password DMA and Set Max Unlock DMA supported
10	Write Buffer DMA Supported
11	Read Buffer DMA Supported
12	DEVICE CONFIGURATION IDENTIFY DMA and
	DEVICE CONFIGURATION SET DMA are supported
13	Long Physical Sector Alignment Error Reporting Control is supported
14	Deterministic read after Trim is supported
Bit	Word 76
0	Shall be cleared to zero
1	Supports SATA Gen1 Signaling Speed (1.5Gb/s)
2	Supports SATA Gen2 Signaling Speed (3.0Gb/s)
3	Supports SATA Gen3 Signaling Speed (6.0Gb/s)
4-7	Reserved for Serial ATA
8	Supports the NCQ feature set
9	Supports receipt of host initiated power management requests
10	Supports Phy Event Counters
11	Supports Unload while NCQ commands are outstanding
12	Supports NCQ priority information
13-15	Reserved for Serial ATA
Bit	Word 78
0	Shall be cleared to zero
1	Device supports non-zero buffer offsets
2	Device supports DMA Setup auto-activation
3	Device supports initiating power management
4	Device supports in-order data delivery
5	Reserved for Serial ATA
6	Device supports Software Settings Preservation
7-15	Reserved for Serial ATA
Bit	Word 82
0	The SMART feature set is supported
1	The Security feature set is supported
2	Obsolete
3	Mandatory Power Management feature set is supported
4	PACKET feature set is supported
5	Volatile write cache is supported
6	Read look-ahead is supported
7	Release interrupt is supported
8	SERVICE interrupt is supported
9	DEVICE RESET command is supported
10	HPA feature set is supported
11	Obsolete
12	WRITE BUFFER command is supported
13	READ BUFFER command is supported
14	NOP command is supported
15	Obsolete

SEAGATE 600 PRO SSD PRODUCT MANUAL, REV. A 29