Displaying and Setting NVRAM

Enabling and Disabling Fast Write (fast_write )

Use the fast_write subcommand to enable or disable the use of the NVRAM to enhance the performance of writes in the SPARCstorage Array.

Supported on:

• SPARCstorage Array

---

luxadm [ -v ] 
fast_write [-s] -c pathname

---

Table 2-26 fast_write Options and Arguments

Option/Argument	Description
pathname	A SPARCstorage Array controller or an individual disk
-e	Causes the SPARCstorage Array to save the change so it will persist across power-cycles
-c	Enables fast writes for synchronous writes only
-e	Enables fast writes
-d	Disables fast writes

Displaying Fast Write Data (nvram_data)

Use the nvram_data subcommand to display the amount of fast write data in the NVRAM for a specific disk. This command can only be used for an individual disk.

Supported on:

• SPARCstorage Array

---

luxadm [ -v ] nvram_data pathname

---

Table 2-27 nvram_data Options and Arguments

Option/Argument	Description
pathname	A SPARCstorage Array controller or an individual disk

Purging Fast Write Data from NVRAM (purge)

Use the purge subcommand to purge any fast write data from NVRAM for one or more disks.

Supported on:

• SPARCstorage Array

---

Caution -

Use the purge subcommand with caution, usually only when a drive has failed.

---

---

luxadm [ -v ] purge pathname 

---

Table 2-28 purge Options and Arguments

Option/Argument	Description
pathname	A SPARCstorage Array controller or an individual disk. If you specify a SPARCstorage Array controller, fast write data for all disks associated with that controller will be purged

Flushing NVRAM (sync_cache)

Use the sync_cache subcommand to flush all outstanding writes for one or more disks from NVRAM to the media

Supported on:

• SPARCstorage Array

---

luxadm [ -v ] sync_cache pathname

---

Table 2-29 sync_cache Options and Arguments

Option/Argument	Description
pathname	A SPARCstorage Array controller or an individual disk. If you specify a SPARCstorage Array controller, outstanding writes for all disks associated with that controller will be flushed