Long-Term Debt

Wells Fargo Credit Agreement

On March 29, 2012, we refinanced the senior secured credit agreement with Credit Suisse (“CS credit agreement”) by entering into a senior secured credit agreement with Wells Fargo Capital Finance, LLC (“Wells Fargo”) providing a revolving credit facility up to $75 million (“WF credit agreement”). The WF credit agreement matures March 29, 2017, or August 16, 2015 if our convertible subordinated notes remain outstanding on that date. We borrowed $49.5 million on March 29, 2012 to repay all borrowings under the CS credit agreement. Amounts borrowed are included in long-term debt on the Consolidated Balance Sheets. We incurred and capitalized $1.0 million of fees related to the WF credit agreement which are included in other long-term assets in our Consolidated Balance Sheets. These fees are being amortized to interest expense over the term of the WF credit agreement.

Under the WF credit agreement, we may borrow on a revolving basis amounts to be used to refinance all debts under our CS credit agreement as well as for general purposes. The maximum principal amount that may be borrowed is the lesser of $75 million, reduced by $1.0 million per quarter commencing July 1, 2012, or the amount of the monthly borrowing base. The monthly borrowing base is comprised of a cash component, an accounts receivable component and an inventory component. We may prepay all or a portion of any amounts borrowed without penalty or premium.

The interest rate on amounts borrowed is based on an election by us of an annual rate equal to (1) a base rate established by Wells Fargo plus an applicable margin of 1.0% to 1.5%, based on availability levels under the WF credit agreement or (2) the LIBOR rate plus an applicable margin ranging from 2.0% and 2.5%, based on availability levels under the WF credit agreement.

At March 31, 2012, we had $49.5 million outstanding borrowings at an interest rate of 4.50%, and subsequently elected the LIBOR rate plus applicable margin on April 5, 2012, bringing the interest rate to 2.72%. In addition, we have letters of credit totaling $0.1 million, reducing the amounts available to borrow on the revolver to $25.4 million at March 31, 2012. Quarterly, we are required to pay a 0.375% commitment fee on undrawn amounts under the revolving credit facility.

The WF credit agreement contains customary covenants, including cross-default provisions, as well as financial covenants that require the fixed charge coverage ratio to be greater than 1.20 for the 12 month period ending on the last day of any month and average liquidity for the most recently completed month of at least $15 million during the period commencing on March 29, 2012 and ending on September 30, 2012, increasing to $20 million on October 1, 2012. In addition, to avoid triggering mandatory field audits and Wells Fargo controlling our cash receipts, we must maintain average liquidity of at least $20 million during the period commencing on March 29, 2012 and ending on September 30, 2012, increasing to $25 million on October 1, 2012. Both the fixed charge coverage ratio and average liquidity are defined in the WF credit agreement. There is also a blanket lien on all of our assets under a security agreement with Wells Fargo. As of March 31, 2012, we were in compliance with all covenants.

Credit Suisse Credit Agreement

On July 12, 2007, we refinanced a prior credit facility by entering into a senior secured credit agreement with Credit Suisse providing a $50 million revolving credit facility and a $400 million senior secured term loan. We borrowed $400 million on the term loan to repay all borrowings under a prior credit facility used to fund the Advanced Digital Information Corporation acquisition. We incurred and capitalized $8.1 million of loan fees related to the CS credit agreement which were included in other long-term assets in our Consolidated Balance Sheets. These fees were amortized to interest expense over the respective loan terms. Interest accrued on the term loan at our option based on either, a prime rate plus a margin of 2.5%, or a LIBOR rate plus a margin of 3.5%. During fiscal 2011, we made principal payments of $81.7 million on the CS credit agreement term loan, and in fiscal 2012 we made principal payments of $104.3 million to fully extinguish the term loan and CS credit agreement.

Subordinated Term Loans

On November 15, 2010, we paid $121.7 million plus $1.8 million in accrued and unpaid interest to settle subordinated term loans with EMC International Company. As a result of the voluntary prepayment in full of these term loans, we have satisfied all of our obligations under these loans. We funded this payment using proceeds from the 3.50% convertible subordinated notes.

Convertible Subordinated Debt

Current Notes Issued November 2010

On November 15, 2010, we issued $135 million aggregate principal amount of the current notes due November 15, 2015 (“current notes”) with a conversion price of $4.33 per share of our common stock. We may not redeem the notes prior to their maturity date although investors may convert the current notes into Quantum common stock until November 14, 2015 at their option. In addition, since purchasers are qualified institutional investors, as defined in Rule 144 under the Securities Act of 1933 (“Securities Act”), the current notes have not been registered under the Securities Act. We pay 3.50% interest per annum on the principal amount of the current notes semi-annually on May 15 and November 15 of each year. The terms of the current notes are governed by an agreement dated November 15, 2010 between Quantum and U.S. Bank National Association. The current notes are subordinated to any existing indebtedness and other liabilities.

We incurred and capitalized $5.0 million of loan fees in fiscal 2011 for the current notes which are included in other long-term assets in our Consolidated Balance Sheets. These fees are amortized to interest expense over the loan term.

4.375% Notes Issued July 2003

On July 30, 2010, we paid $22.1 million plus $0.5 million in accrued and unpaid interest to redeem the 4.375% convertible subordinated notes outstanding at that date in accordance with the contractual terms at maturity. These notes matured August 1, 2010.

Gain (Loss) on Debt Extinguishment, Net of Costs

In fiscal 2012, in connection with fully extinguishing the CS term loan and credit agreement on March 29, 2012, we wrote off $2.3 million of unamortized debt costs related to the CS term loan and credit agreement.

In fiscal 2011, in connection with the repayment of our subordinated term loans on November 15, 2010, we wrote off $1.2 million of unamortized debt costs related to these term loans.

In fiscal 2010, in connection with a tender offer and a private transaction for the 4.375% convertible subordinated notes issued July 2003, we recorded a gain on debt extinguishment, net of costs, of $12.9 million comprised of a gross gain of $15.6 million, reduced by $2.1 million in expenses and $0.6 million of unamortized debt costs related to these notes.

Debt Maturities

A summary of the scheduled maturities for our outstanding debt as of March 31, 2012 follows (in thousands):

Derivatives

We do not engage in hedging activity for speculative or trading purposes. Under the terms of the CS credit agreement, we were required to hedge floating interest rate exposure on 50% of our funded debt balance through December 31, 2009. We entered into an interest rate collar instrument with a financial institution that fixed the interest rate on $100.0 million of our variable rate term loan from December 31, 2008 through December 31, 2009. We incurred $1.5 million in interest expense in fiscal 2010 on this collar.

Our interest rate collar did not meet all of the criteria necessary for hedge accounting. We recorded the fair market value in other accrued liabilities in the Consolidated Balance Sheets and the change in fair market value in other income and expense in the Consolidated Statements of Operations, recognizing a gain of $1.2 million in fiscal 2010. As of December 31, 2009, the interest rate collar had expired.