Atempo, a Palo Alto, Calif. company that provides data backup, recovery and archiving services to businesses, has raised $22 million in a second round of funding.

Here’s the announcement.

The company’s software works on Windows, Mac, Linux, Unix, and iSeries operating systems and so has been attractive to businesses that have a mixture of operating systems.

The company says it has more than 3,000 customers.

The financing came from Intel Capital, which led the round, Steelpoint Capital Partners and Ridgewood Capital.

Previously, the company had raised $17 million from Bank of America Capital, KBC Investco and Vision Capital in the tough years of 2000 and 2002 — but those firms are not investing more into the company, having either left the investing world altogether or changed their their focus.